How to Can Tomato Sauce (My Favorite AllPurpose Version)
Once the sauce has reduced by half and the flavor is where you want it to be, add 1 tablespoon of lemon juice to each pint jar and 2 tablespoons of lemon juice to each quart jar. Ladle the sauce into the jars, leaving 1/2inch headspace. Process pints for 35 minutes and quarts for 40 minutes in a hot water bath canner.