Slice 4-5 potatoes in greased casserole. Salt and pepper to taste. Slice 1 onion over potatoes. Fry 1 pound hamburger and spread over potato mixture. Mix:
1 can cream of mushroom soup
1 can milk (soup can)
Pour over mixture. stir once. Bake 45-60 minutes or until potatoes are done. Sometime during the last 10 minutes of baking spread grated cheese on the top.