1 lb. ground beef
1 onion, chopped
2 (15 oz.) cans tomato sauce
1 c. water
1/2 tsp. oregano
1/2 tsp. salt
1/2 c. olives, sliced
2 c. elbow macaroni, cooked
2 c. cubed American cheese

In skillet, brown beef and onion; drain. Blend in tomato sauce, water, oregano, salt and olives; simmer 10 minutes. In 2 1/2 quart casserole, layer half macaroni, half meat sauce and half cheese. Repeat layers. Bake at 350 degrees for 20 to 30 minutes.