To make pizza sauce from scratch, blend tomatoes, water and olive oil in a food processor. Transfer the mixture to a pot, and stir in garlic salt and vinegar. Bring the mixture to a boil first, and then reduce heat and simmer. Finally, puree the tomato sauce in a blender.
A blender can be used instead of a food processor to blend 10 Roma tomatoes, 1 cup of water and 2 tablespoons of olive oil. After the mixture has been transferred to a large pot for cooking, add 1/4 cup of white sugar, 2 tablespoons of garlic salt and 1 tablespoon of white vinegar.
Preparing the fresh tomatoes and additional ingredients used for making a pizza sauce recipe from scratch requires simmering the mixture for one to two hours until it thickens, while using medium to low heat and stirring occasionally. Using the pulse and blend settings on the blender or food processor, puree the tomato sauce in separate batches until smooth. This recipe takes approximately 10 minutes of preparatory time and a minimum one hour of cooking time.
This pizza sauce recipe yields enough sauce for eight 12-inch pizzas if using approximately 6 tablespoons of sauce for each pizza. Extra pizza sauce can easily be frozen in bags and stored in the freezer. When ready to use the pizza sauce, simply run hot water over the bag to thaw the sauce.