Layer patties in a casserole, top with layer of sliced potatoes, onions and mushrooms.
Open mushroom soup and add one can of water or milk, heat on low heat until mixed thoroughly. Then, pour mixture
over all the layers until almost covered completely. If more liquid is needed, add more milk.
This meal is usually served with a side of rice.
Bake at 350 until potatoes are cooked tender when poked with a fork. (About 1 hr and 15 minutes.) Enjoy!