Hamburger Casserole Au Gratin
["1 lb. hamburger", "1 onion", "1 lb. grated cheese", "5 large potatoes", "1 can cream of mushroom soup", "1 can Durkee onion rings"]
["Brown hamburger and onion. Salt and pepper to taste.", "Boil potatoes, peel and slice.", "Thin the soup with 1 can of milk.", "Add in layers: first potatoes, then meat, cheese, onion rings and soup.", "Make 3 layers in all, ending with onion rings.", "Warm at 350\u00b0 until cheese bubbles."]
["hamburger", "onion", "grated cheese", "potatoes", "cream of mushroom soup", "onion rings"]