Hamburger casserole

1 lb hamburger
1/2 onion chopped
5 potatoes
1 pkg cheddar cheese
1/2 can cream of mushroom soup
1/2 c milk

Boil potatoes
Cool then slice

Brown hamburger
Add chopped onions

Preheat oven to 350
Grease 2 qt casserole dish
Place hamburger & onion mixture in bottom
Add sliced potatoes
Add cheese
Add soup and milk on top
Cook 45 minutes