These are some of the things that make good spaghetti sauce. I had the opportunity to save some vegetables. When I make the sauce, I will add tomatoes, onions, and garlic. Making vegetable ragù is easy. People use frozen food everyday: frozen pizzas, frozen peas, frozen vegetables, ice cream, frozen hamburger patties, frozen fish, frozen berries, frozen juice concentrate… I cannot always use an entire bag of celery or carrots in a week. This is a method for eating the very best foods always. Use the moisture that the vegetables release in the bag to add flavor to the stock for the sauce.