1 1/2 c. uncooked elbow macaroni (6 oz.)
1 (6 1/2 oz.) can tuna, drained and flakes
2 c. shredded cheddar cheese (8 oz.)
1 onion, finely chopped
1 can cream of mushroom soup
1 soup can water

Heat oven to 350 degrees. Cook macaroni as directed on package; drain. Mix macaroni, tuna, cheese, and onions. Pour into greased 2 quart casserole. Heat soup and water to boiling. Pour over macaroni in mixture. Bake uncovered until bubbly, 30-35 minutes. 6 servings.