The one thing I learned when teaching myself to can salsa was that in order to use a water-bath canner to make salsa shelf stable, it’s important to use a recipe from a trusted source that uses USDA guidelines. This is because there are so many low-acid ingredients in salsa (peppers, onions, and garlic) that it creates a delicate balance between the acid (tomatoes and usually another ingredient like vinegar or lemon juice) and the low-acid ingredients.
Hi Cheryl. Thanks for your question. The reason is two-fold. First, you want to salt your veggies to pull some moisture out and help them to stay more crisp after canning. (You’d do something similar if you were pickling cucumbers.) Second, you need a hot liquid to can your salsa in. We hate to throw away the flavorful juice. So, instead of using water or a store-bought can of tomato juice to create the liquid, we just recycle the juices that were already in the tomatoes.
I started hunting around for recipes, and came up with several that looked promising, but the one I settled on was from PickYourOwn.org. I just checked the link, and they’ve changed the recipe that’s posted, but I’ll be sticking with the one I have. This makes a mild homemade salsa. In 2013, we made seven batches of home canned salsa. The “boys” love salsa, even now that they have grown up.
Ultra Gel is ultrafine cornstarch, which is used to thicken the salsa. It is now the preferred product for thickening when canning. I recently purchased Ultra Gel, which is GMO free. Clear Jel is a similar product. When I first made this home canned salsa recipe, it called for cornstarch, but Ultra Gel and Clear Jel are now recommended over corn starch for canning.
I just made this wonderful salsa a couple of days ago with roma tomatoes. I 4X the recipe and ended up with 32 pints of salsa. We liked it so very much I am thinking of doing more with the 1 1/2 bushels of regular tomatoes that I have. Do you think that the regular tomatoes would have too much liquid in them or would the draining take care of that problem? I didn’t add the paste last time so I would probably add it for sure to make it thicker.