This is a simple, delicious casserole to put together. I have made this using ground beef and tomato sauce, or with a seasoned ground pork sausage and along with a traditional style spaghetti sauce. No matter how it's made, both taste great! The seasoned pork sausage I used, already had salt, course cracked pepper, dried sage, onion and fresh garlic added to it. Have also made this using a lb. of leftover (already-cooked) taco seasoned meat, which gave this dish lots of flavor.