"Tomato sauce" is a very ambiguous term, and pizza sauces are not necessarily cooked. Just open a can of crushed tomatoes (or crush them yourself) and stir in s

"Tomato sauce" is a very ambiguous term, and pizza sauces are not necessarily cooked. Just open a can of crushed tomatoes (or crush them yourself) and stir in some salt, olive oil and whatever other seasonings you want (garlic, oregano, etc.). That is pizza sauce. That's what it looks like in the picture being talked about.