Pourthe hot tomato juice into each jar, leaving 1/2 inch head space. You can easily measure the headspace with this inexpensive canning funnel. Wipe rims of jars with a clean dish towel and place lids and rings on jars. Process jars in boiling water canner for 40 minutes.
Youcan add a thickening agent to thicken tomato juice. Add cornflour/cornstarch, arrowroot powder, and potato starch to thicken the sauce. Starch can alter the flavor of the sauce so start by adding a teaspoon of it. You can also thicken your tomato juice with a roux, which is just a blend of fat and flour in a 1-to-1 ratio. Canning Preserving vegetables, Summer. When canning tomatoes safely at home, be sure to use tested canning recipes that add citric acid, vinegar or lemon juice. Tomatoes are a medium-acid food with a pH in the range of . You must use a tested canning recipe that has determined the amount of acid to add in order to increase the acidity Directions Blend 2 cups water, tomato paste, lemon juice, sugar, and salt together in a blender until smooth; pour into a 1/2 gallon container. Stir 3 cups water into mixture. Refrigerate until thickened, about 1 hour. Add 1 more cup water if juice is too thick. I Made It.Removethe cooked tomato mixture from the heat and let it cool for at least 10 to 15 minutes. Pass the tomato mixture through a sieve or food mill to remove all tomato solids, the onion, and the celery. Chill the finished tomato juice for at least several hours before serving. Store any extra juice for up to several days in the refrigerator.