Making Tomato Passata and Pelati the Italian Way

This is the time of year when tomatoes are ripening on the vine in both the U.S. and Italy. Even if you don't grow your own tomatoes, this can be also the time to make your own Italian style passata di pomodoro--a basic tomato sauce that has all the skins and seeds removed, with all the flavor left behind.

Here in the states, the closest canned product is called "tomato puree". Many families in Italy make the processing and canning of passata a yearly event--a family event--making enough jars of passata to last the entire year, often enough for extended famiglia. If you're not growing enough of your own paste style tomatoes, you can always buy a bushel or two or three from your local farm stand. Some Italian families will process up to 500 pounds of passata each year!

Think of passata as a basic tomato sauce which you can use in all sorts of recipes, or even as a base to make other tomato-based sauces, such as Puttanesca, Amatriciana, Bolognese (ragu), Vodka sauce, sugo ("Sunday Gravy") or for pizza sauce. The word "passata" (passed, screened, smashed) refers to the processing with a special food mill that removes the seeds, pulp and skins, leaving only the tomato sauce behind. Other family recipes might just use a common food processor or blender, but this can't really give you a genuine passata.

The cleaned, ripe tomatoes are cut up, boiled and processed to remove the skins and pulp, and finally canned in a traditional manner using a hot water bath and canning jars. Some family recipes might also add other spices or flavorings such as garlic as they boil the tomatoes, but since passata is a base to make a wide variety of sauces, you might want to add them at the time of cooking the final sauce. It is traditional, however, to add one large basil leave into each jar canned.

The Method of Making Passata

Although you can make a passata in very small quantities, we will look at how to make a large volume for the purposes of canning and storage. We would love to promote this time honored, annual ritual here in the United States. Wouldn't it be better to have a yearly stock of your own tomato passata rather than buy supermarket sauces filled with chemical preservatives and other additives?

What Type of Tomato is Best?

In Italy, the best for this is San Marzano tomatoes (used in the best imported canned tomatoes), which have DOP protection and are only grown in the area of Naples surrounding Mount Vesuvius. Of course, many varieties are grown in the U.S. calling themselves "San Marzano", but they are only a similar variety. (You can't match San Marzano tomatoes because of their uniqueness of being grown in volcanic soils.)

In reality, any good-tasting, full-bodied paste type tomato will work well. The tomato you select should have sweetness, depth of flavor, but also a touch of acidity--which benefits long preservation. Most paste tomatoes are thick fleshed and have a similar shape to San Marzano--that is, an elongated plum shape. You can also use larger cherry tomatoes or horn-pepper shaped varieties. Again, if it has a great taste, it will make a great passata. Leave the larger, beefsteak varieties for slicing and eating fresh.

If you want to grow your own heirloom canning tomatoes from seed,  we can highly recommend Striped Roma (horn shaped, sweet), Jersey Devil (horn shaped, very meaty), Debarao (plum shaped, juicy) and Martino's Roma (classic plum tomato). If you want to plant enough for lots of passata, plan on planting a minimum of 10 plants of one single variety that you earmark for canning.

How Many Tomatoes?
This really depends on how ambitious you are. if you use lots of tomato sauce in your recipes each year, then start with more tomatoes. You will also need more canning jars, lids and other varied supplies and tools. Having a very large pot or cauldron to boil the tomatoes helps prevent tedious, repeated boiling/canning sessions. I highly recommend doing it the way most Italians do it--using a tomato processing mill. I also love the way Italians use a very large pot to boil their jars and to do the final canning process--they use kitchen towels to layer in the glass jars to protect them from rattling around against each other.

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Here are some guidelines:

3 pounds of tomatoes to make 1 quart of passata.
21 pounds of tomatoes will make 7 quarts of passata.
One bushel of tomatoes (about 53 lbs per bushel) will give you 15-18 quarts of passata.
You will also be using sea salt and placing basil leaves into each jar.

• To sterilize the jars, boil them for 20 minutes in as large a pot as you have, layering them with cotton kitchen towels to prevent breakage.
• You don't need to sterilize the jar lids since you will buy new lids each year. Simply wash them in hot soapy water before use.

 

1. Never reuse jar lids!
2. You can reuse jars as long as they aren't chipped, but always buy new lids!
3. NEVER re-use recycled jars from the supermarket--their glass might not be thick enough to withstand the pressures of the canning process. Large buckets – for washing and storing the tomatoes

Things You will Need

• Sharp paring knives
• Large aluminium stock pot or cauldron
• Large triple ring gas burner
• LP gas bottle(s)
• Large size strainer/colander
• Clean cotton tea towels
• Electric tomato mill
• 2 ounce canning jars and new lids
• Large stock pot or cauldron for boiling bottles
• Large stidding spoon/paddle
• Large pouring ladle
• Large jar funnel

(For a large volume...)

• Once you have your supply of tomatoes, sort them as to their ripeness. Any tomatoes that are fully ripe (or cracked) should be cooked and processed right away. Tomatoes that need more ripening need to be laid out (not touching each other if possible) several days before processing on a large folding, catering table or even a sheet of plywood under a covered porch, or on a large table in your house. This will ensure they attain full ripeness. A ripe tomato will have reached its full color, won't feel too hard when squeezed gently, and will have an obvious fresh tomato scent when the skin is held close to the nose.
• Before processing, remove any tomatoes that might be overripe, with a slightly rotten odor. A good sniff will tell you if they are OK or not. A ripe tomato will smell sweet with a strong tomato scent. An over-ripe tomato will smell nearly rotten--a bit sour. Your nose will tell you, so if it's unpleasant, toss it.
• Removed any remaining stems by grasping the stem firmly between your fingers and giving a sharp twist.
• Next, run fresh water over your tomatoes to clean them, placing them in any type of large plastic tub or even a new 5 gallon bucket.
• Now cut only enough tomatoes in half or quarters to fill 1/2 of your large pot or cauldron. Cut off any obvious defects or blemishes. Toss them into your cauldron or large pot as you work. -- The reason for not filling the pot with water is that the cut tomatoes first boiled in the pot will produce their own liquid, which becomes the boiling liquid to cook more uncut tomatoes. You might see some passata recipes that either remove the juicy centers before processing, or which boil cut tomatoes in water. Doing either will only lessen the intensity of pure tomato flavor.
• Set up the cauldron over a portable gas cooker outside and bring your cut tomatoes to a boil and stir until they produce a boiling liquid.
• After your cut tomatoes come to a boil, you can add more un-cut tomatoes until you fill your pot, then bring back to a boil and cook for another 10-15 minutes.You want to stir the tomatoes from time to time, so you'll need a fairly large wooden spoon or paddle.
• The next step is to strain as much water out of your tomatoes as possible: for smaller amounts, use either a large colander (in Italian, scolapasta): for large volumes, you can use a clean, plastic milk crate lined with a clean pillowcase.

You can use a standard hand-cranked food mill or a manual tomato milling machine to process the tomatoes, but if you're doing a large volume, you should consider investing in a powered tomato mill. The more power the unit has, the faster your processing will go. You might need to set up your milling machine on a low table, with bowl on the table to capture the pulp and a large container on the floor to capture the passata. 

• To start processing your tomatoes, allow the sauce to pour into a large bowl, pot or plastic container, and a bowl or pan to catch the pulp. (Carefully read directions from your manufacturer). Repeat as needed. (If you are processing huge amounts of tomatoes, you might plan processing over the course of several daily sessions.)
• When finished, run the pulp through the mill one or two more times to get even more of the juices. (Or if you have chickens, do as Italians do and feed the pulp to them). When finished, add 2-3 handfuls of sea salt to each large container of passata and stir well. Salt will aid in long preservation.
• Ladle your finished passata into your canning jars, adding one large, fresh basil leaf into the bottom of each jar before filling.  Fill each jar to within 3/4" - 1" from the top of the rim and screw on the lids tightly. (Every few jars, be sure to occasionally stir up the large container of passata to keep the solids from settling to the bottom.)
• After all of your jars are filled, it's time to pasteurize them. First, clean your large pot or cauldron that you will use to boil your bottles. Place clean cotton towels on the bottom and start layering in your jars, lying on their sides. Continue layering jars and towels until your cauldron is full. Fill the cauldron with fresh water.
• Bring your pot/cauldron to a boil and then allow to boil gently for 45 minutes.
• Next, turn off the burner and wait until the water has cooled enough for you to remove jars while wearing a pair of kitchen gloves. (Be careful! Handle the jars gently and don't allow them to hit into each other. At this point, they are under pressure!) 
• Dry and place all of your jars in a cool, dry place, away from sun (perhaps a cellar) to cool down overnight (minimum 12 hours). Lay them out on a plastic tablecloth or poly painter's tarp in case any jars break open as cooling down. After 5-10 hours, each jar will start making a "pinging" sound as their lids pop downwards.
• To make certain they are sealed properly, inspect each lid to make sure their dimples are depressed. Any jars with dimples popped upwards should be stored in the refrigerator and used within 2 weeks or frozen in plastic containers.
• Using this Italian method of processing and canning passata should give you safe jars that can be kept as long as three years! Share them with family and friends!

What About Canning Whole Tomatoes?

In Italy, whole canned tomatoes are called pelati, referring to the process of peeling the skins off before canning. In the area of Naples, many families invest in crates of locally grown San Marzano tomatoes, but any pear/plum shaped past tomato will do fine.

Before caning whole tomatoes, the best way to prevent spoilage is to remove the skins. Canning peeled tomatoes also affords more options for use in recipes that might call for crushed tomatoes. Skinned, whole tomatoes are easy to crush by squeeze by hand or pulsing in a food processor.

• As in the passata process described above, clean your tomatoes and remove any that are blemished or over-ripe. You only want blemish free, ripe tomatoes for canning whole.
• Also as when making passata, you should have your sterilized jars and new lids ready for filling.
• To remove the skins, boil a large pot/cauldron of water, then plunge your tomato (working in managable batches) into the boiling water for 60-90 seconds.
• Remove the tomatoes, plunge briefly into cold water, then lay out on kitchen towels to cool a bit more for handling.
• To remove the skins (or rather, to remove the tomato from ts skin), hold the tomato with the stem end toward you. With a pinch, break and tear open the skin a bit on the bottom of each tomato (opposite the stem end). Next, grip the plum tomato in your hand and with the thumb of your other hand, push the tomato out of its skin and into a waiting bowl.
• As one person pops the tomatoes out of their skins, another can start filling the jars. First, place a good pinch of sea salt at the bottom of each jar.
• Next, place the skinned tomatoes in the jars leaving no air-spaces between them. Press them gently together and pack the jar within 1/2" from the top. Sprinkle another pinch of sea salt on top of the tomatoes. if there are any air bubbles on the sides of the glass, give each jar a gentle tap or use a clean fork to release and bring them to the top.
• Once you have finished and all of your pelati jars are filled, do the same as before with your large pot/caldron, laying in kitchen towels and jars until filled nearly to the top. Light your burner and bring to a gentle boil.
• Once the water is boiling, let the jars boil for another 30 minutes, then turn off the burner and allow the water to cool down enough until you can start removing jars with using kitchen gloves. set all of your pelati jars to cool in a dry place as before, allowing them to cool until the lids have "pinged" to seal. (If you have several batches to boil, watch the third video below for a great tip on how to remove the hot water so you can remove jars and then re-use the hot water for the next batch to be boiled.)

NOTE: You can also use a combination of the two techniques above to can whole cherry tomatoes. In this process, after cleaning the tomatoes and filling jars as above, ladle some passata to fill the voids in between all of the cherry tomatoes, again, leaving 3/4" - 1" from the top, then boil to sterilize the jars as with the pelati method above. .

Don't forget to label your Passata and Pelati with the month and year. (Order oval Avery labels HERE on Amazon). Store them in a cool, dark place. They will last for as long as three years.

Read this article carefully, watch the videos below and by all means, work safely! Make this a yearly event for your extended famiglia. I've read about families who take gather large teams together to process as much as 500 pounds of tomatoes! I would suggest starting small until you get used to the process. You can also make small volumes of passata or pelati right in your kitchen with a large stock pot, colander and tools you have lying around. And whether you use a manual tomato mill or powered, I'm sure you'll be successful and enjoy a fully packed cantina (pantry) all season long.

--Jerry Finzi, GVI

If you are new to canning, you can study the principles of safe canning HERE.

Useful Processing Tools on AMAZON...

The video below is one of the best I have found covering many aspects of making Passata and Pelati. There are some titles in English,
but it might also help to click the gear icon on YouTube
to turn on Closed Captions and Auto-Translate to select English...