1 pkg. elbow macaroni
1 can tuna fish
1 can Campbell's mushroom soup

Put layer of cooked macaroni in greased casserole. Then layer of tuna fish. Repeat until casserole is filled. Pour mushroom soup and 1/4 cup water over it. Cover with buttered crumbs and bake for 45 minutes in 375 degree oven. (May add green peppers or pimiento if desired.)