My friend, Dan, gave me this recipe more than 30 years ago. It is delicious and so easy to make, and it freezes really well. The caraway seeds are the secret. When I make this sauce, I usually double it. This way, I can use about one-quarter of the mixture on the pizzas for that night. Then I freeze the rest—in three separate containers—for later use. A quarter of the mixture will cover about two large pizzas, but it depends on your preferences.