1 lb. ground beef
1/2 package elbow macaroni (about 1 cup)
2 8 oz. cans tomato sauce
1 (2 1/2 oz.) can sliced mushrooms
2 cups shredded cheddar cheese
Brown beef, drain grease. Cook macaroni as directed on box. Mix beef, macaroni, mushrooms, tomato sauce, and 1/3 of the cheese in a casserole dish. Top with remaining cheese. Bake until bubbly (about 45 minutes at 350).