Preheat oven to 350 degrees. Place frozen hash brown potatoes in a layer in ... baking dish. Saute onion in butter. Sprinkle onion over ... degrees. Sprinkle French fried onions over top of casserole and bake 5 minutes more.
Butter or spray 9x13 inch pan. Cover bottom with hash browns. Brown hamburger and onion and drain. Put hamburger over ... and top with onions. Bake another 15 minutes with oven SHUT OFF.