Simmered Tomato Sauce with Chiles and Cardamom

Even though many recipes in the book use tomato sauce, I’m not going to insist that you make your own. I certainly want you to make these curries, but I am all for cutting corners to save time if it doesn’t mean a compromise in the flavor. However, store-bought canned tomato sauce won’t contain the spices this one does, so if you happen to have a few spare minutes on an uneventful Saturday afternoon, double or even triple the batch and freeze it in half-cup sizes for future use. The ingredi