1 can cream of mushroom soup
1 can tuna fish
1 c. mayonnaise
1/2 c. onions
1 bag noodles
1 c. cheese
1 c. milk

Put soup, milk, and cheese in a pan and cook on low until cheese melts. Mix onions and tuna, add mayonnaise in a bowl. Mix together; add salt and pepper. Then cook noodles for about 15 minutes with 1 tablespoon butter. Put soup, tuna, and noodles together and mix well. Put in a buttered casserole dish. Bake in oven for about 30 minutes at 250 degrees.