1 c. macaroni rings
1 lb. wieners, sliced into 1/2" pieces
1/4 c. chopped onion
2 tbsp. butter
10 3/4 oz. can condensed tomato soup
1 c. shredded American cheese
1/2 c. water

Cook macaroni to desired doneness according to directions on package. Drain. In large skillet, saute wieners and onion in butter until onion is tender. Reduce heat, stir in soup, cheese and water. Cook over low heat, stirring constantly until cheese is melted. Stir in cooked macaroni, heat thoroughly.