Most ketchup has white vinegar in it, which contains gluten. Below is a recipe for ketchup that can be made in less than fifteen minutes at home and stored in the refrigerator. Ingredients 1 12 oz can tomato paste ¼ cup water ½ teaspoon cinnamon 1 teaspoon ground rosemary 1 teaspoon ground sage ¼ teaspoon salt 1 teaspoon spaghetti seasonings (you can use any italian/spaghetti seasoning mix you'll find at the grocery store for this, or a combination of basil, oregano, red ...