FAVORITE CASSEROLES: Chicken Pot Pie; Tuna Noodle Casserole; Vegetarian Pot Pie; Creamy Chicken Chorizo Casserole This dish began as a way to use up leftovers. When I was in high school, we liked to mix yesterday’s spaghetti with yesterday’s tomato sauce, add some chopped-up mozzarella and handfuls of Parmesan, and bake portions in the large ramekins we...