Cook beef, onions and bell pepper ... of water and macaroni. Stir in corn and mushrooms. Pour in casserole dish, sprinkle with cheese, bake for 20-25 minutes.
Lightly brown onions in butter. Add beef and brown; drain fat. Add ... on low. Cook macaroni until tender. Drain off water. Mix in casserole dish and top with cheese ... degrees until cheese melts.
Place tomatoes, tomato sauce, onions ... simmer while cooking macaroni and browning meat. Add meat ... and pour in casserole. Add meat, sauce and ... 375 degrees until bubbly.