Layered Casserole 1 pound hamburger 1 large onion, chopped 4 to 5 medium potatoes 1 can whole kernel corn 1 can tomatoes Salt and pepper, to taste Brown the hamburger in a cast iron Dutch oven; drain drippings. Add onion, potatoes, corn and tomatoes in layers. Add water, if needed, to form liquid. Cover with a tight lid and simmer until potatoes are done.