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.
Heat olive oil in a medium saucepan over medium heat. Add onions and garlic and cook until soft. Add pureed tomatoes with their juices, crushed tomatoes, tomato paste, 1 cup water, bay leaf, parsley, Cubano pepper, and bring to a boil. Season, to taste, with salt and pepper.eat olive oil in a medium saucepan over medium heat. Add onions and garlic and cook until soft. Add pureed tomatoes with their juices, crushed tomatoes, tomato paste, 1 cup water, bay leaf, parsley, Cubano pepper, and bring to a boil. Season, to taste, with salt and pepper.