8 oz. macaroni
1 can cream of mushroom soup
1 sm. onion
1 tbsp. butter
1 c. mayonnaise
1 lb. sharp Cheddar grated cheese
4 or 5 saltine crackers
Bacon bits

Cook macaroni and drain. Reserve 1/4 of cheese for topping. Mix ingredients in 2 quart baking dish. Top with cheese, cracker crumbs and bacon bits. Bake at 350 degrees for 30 minutes.