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.
Step 1, In a medium saucepan over medium heat, melt the butter. Thoroughly stir in the cornstarch. Stir in the sour cream. When the mixture becomes hot and bubbly, mix in Cheddar cheese and salsa. Continue stirring until cheese has melted and mixture begins to thicken, about 10 minutes. Serve hot.