Yield: Makes about 3 x 500 ml jars
Prep Time: 60 minutes
Processing Time: 35 Minutes
Traditional Italian tomato sauce made with liberal quantities of olive oil and vegetables cannot be safely processed in a boiling water canner. A pressure canner is required to safely process low acid foods. This updated recipe delivers traditional Italian flavour with no oil. It balances its low acid vegetable content with added acid—lemon juice—and has been scientifically tested to yield a home canned product which can be safely processed in a boiling water canner. Do not alter the ingredients or quantities as this may result in an unsafe product. (Add olive oil for flavour when re-heating the sauce to use in recipes.)
8 cups (2000 ml) tomato purée, about 5 lb (2.2 kg), 20 plum tomatoes,
2/3 cup (150 ml) finely chopped onion
2/3 cup (150 ml) finely chopped celery
1/2 cup (125 ml) finely chopped carrot
2 cloves garlic, minced
4 tbsp (60 ml) bottled lemon juice
2 tsp (10 ml) salt
1/2 tsp (2 ml) freshly ground black pepper
1/4 – 1/2 tsp (1-2 ml) red pepper flakes
• Place 3 clean 500 ml mason jars on a rack in a boiling water canner; cover jars with water and heat to a simmer (180°F/82°C). Set screw bands aside. Heat SNAP LID® sealing discs in hot water, not boiling (180°F/82°C). Keep jars and sealing discs hot until ready to use.
• Blanch, peel, core and chop tomatoes; place in colander. Let stand 15 minutes; discard liquid. Purée tomato pulp in a food processor or pass through a sieve or food mill. Measure 8 cups (2000 ml).
• Place onion, celery, carrot and garlic in a large stainless steel saucepan; add 1 cup (250 ml) tomato purée. Bring to a boil; reduce heat, boil gently, covered, until vegetables are tender, about 5 minutes. Add remaining tomato purée 1 cup (250 ml) at a time while maintaining mixture at a boil, stirring frequently. Stir in lemon juice, salt, black pepper and red pepper flakes. Boil hard, stirring frequently, until desired consistency is reached, about 15 minutes.
• Ladle sauce into a hot jar to within 1/2 inch (1 cm) of top rim (headspace). Using nonmetallic utensil, remove air bubbles. Wipe jar rim removing any food residue. Centre hot lid on clean jar rim. Screw band down until resistance is met, then increase to fingertip tight. Return filled jar to rack in canner. Repeat for remaining sauce.
• When canner is filled, ensure that all jars are covered by at least one inch (2.5 cm) of hot water. Cover canner and bring water to full rolling boil before starting to count processing time. At altitudes up to 1000 ft (305 m), process – boil filled jars – 35 minutes.
• When processing time is complete, turn stove off, remove canner lid, wait 5 minutes, then remove jars without tilting and place them upright on a protected work surface. Cool upright, undisturbed 24 hours; DO NOT RETIGHTEN screw bands.
• After cooling check jar seals. Sealed discs curve downward and do not move when pressed. Remove screw bands; wipe and dry bands and jars. Store screw bands separately or replace loosely on jars, as desired. Label and store jars in a cool, dark place. For best quality, use home canned foods within one year.