Phosphonate salts are the result of deprotonation of phosphonic acids, which are diprotic acids: Phosphonate esters are the result of condensation of phosphonic acids with alcohols. Several methods exist for the preparation of phosphonic acids and their salts.
1 Stir in the tomato sauce, tomato paste, vinegar, diced tomatoes, and brown sugar. Season with chili powder, Italian seasoning, and salt. Bring to a boil, reduce heat to low, and simmer 1 hour.  Mix the cornstarch and water, and stir into the salsa to thicken. Transfer salsa to sterilized jars, leaving 1/2 inch headroom, and seal. Process jars in a boiling water bath 15 minutes. Store unsealed jars in the refrigerator.
How to make a foil packet: 1  1. Lay a large sheet of heavy-duty foil or a double layer of regular foil on a flat surface. 3. Tomatillo-Pineapple Salsa: Toss 3/4 pound diced husked tomatillos, 1/2 cup diced pineapple, 1 each minced jalapeno and shallot, and 1 tablespoon olive oil on a sheet of foil.