Tomato, Cheddar & Beef Macaroni

1 pound ground beef
1 cup chopped onion
1 can diced tomatoes with basil, garlic and oregano
1 cup water
1 cup elbow macaroni
1 1/2 cups cheddar cheese

Brown the ground beef with onions. Drain. Stir in tomatoes, water and macaroni. Cover and simmer 10 minutes or until tender. Stir in cheese and serve.