Preserving Summer's Bounty: Tomato Canning Guide
Safe and Nutritious Canning of Crushed Tomatoes Using a Pressure Canner
Canning crushed tomatoes at home can be a rewarding experience, providing you with a stockpile of delicious, nutritious tomato products for the winter months. To ensure safety and quality, it's essential to follow specific guidelines when canning tomatoes using a pressure canner.
Firstly, start with fresh, ripe tomatoes that have been thoroughly washed. Blanch the tomatoes briefly in boiling water to loosen their skins, then cool them in ice water and peel them. This step enhances the texture and quality of the final product.
Next, crush the peeled tomatoes and add the appropriate amount of bottled lemon juice or citric acid to each jar. This acidity adjustment is crucial for ensuring the safety of your canned tomatoes from botulism and spoilage. Typically, 2 tablespoons of lemon juice per quart jar or 1 tablespoon per pint jar should be used.
Add salt if desired, about 1 teaspoon per quart or 1/2 teaspoon per pint. Fill the jars with crushed tomatoes, leaving 1/2 inch headspace, remove air bubbles, wipe rims clean, and apply lids and bands finger-tight.
Now, it's time to process the jars in a pressure canner. The processing times and pressures will vary based on altitude, but generally, they range between 10 to 15 PSI for 35 to 45 minutes for tomatoes.
After processing, let the jars cool undisturbed for 8-12 hours, then remove the bands and store the jars in a cool, dark place for up to 18 months.
For detailed, reliable instructions, consult trusted canning guides such as those from the National Center for Home Food Preservation or university extension services. These resources provide tested recipes for pressure canning tomatoes. Some home canning blogs and videos also demonstrate this process step-by-step with safe practices.
In summary, to can safe and nutritious crushed tomatoes, use bottled lemon juice or citric acid for acidity, follow pressure canning processing times precisely, and handle jars properly. This method preserves the tomatoes' nutritional quality while preventing spoilage and foodborne illness.
When canning, select only disease-free, preferably vine-ripened, firm fruit. About 21 pounds of tomatoes are needed per canner load of 7 quarts for whole or halved tomatoes, and about 22 pounds for crushed tomatoes (no added liquid).
Remember, salt can be added to canned tomato products, but its use is optional. Tomatoes can be canned in various forms, including whole, halved, or crushed, but canning whole cherry or grape tomatoes is not advised.
For more information, refer to "So Easy to Preserve" by E. Andress and J. Harrison (6th ed., 2014) or the "Complete Guide to Home Canning, Agriculture Information Bulletin No. 539" by the United States Department of Agriculture (2009).
Happy canning!
Engaging in canning transformed your home into a small-scale food-and-drink production, offering an array of lifestyle benefits as well as a stock of home-and-garden produce for the colder seasons. Moreover, with the advent of canned tomatoes, cooking meals during winter joins the list of rewards, providing a nutritious and delicious food option.
