Preheat oven to 300°F. Cook and drain macaroni. Brown beef with diced onion; drain excess ... shredded cheddar or mozzarella cheese. You can also use ... bake for 45 minutes.
In a large skillet, heat oil, ground beef, saute gently. Remove from ... cook 5 minutes., Slice Mozzarella cheese. Spread on top of ... Watch carefully. Serve immediately.