In this video, discover how to make long-simmered tomato sauce– the traditional spaghetti sauce that's delicious at any time of year. As it simmers and the liquid gradually cooks off, the sauce thickens and the flavors build and meld together. Any other veggies you add to the sauce will end up being richer and sweeter the longer they prepare. During the summer, turn a bumper crop of ripe tomatoes into a long-simmered tomato sauce. And when fresh…