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 It. 1  Heat oil in a medium saucepan over medium-high heat. Add onion and cook until soft and translucent, 6-7 minutes. 2  Add tomatoes with juice, tomato sauce, vodka, and crushed red pepper, then bring to a boil. 3  Reduce heat and cook, stirring occasionally, until sauce reduces slightly, about 10 minutes.