Mix sour cream and cream of mushroom soup together. Add green beans. Stir all together and put in a 9 x 13 casserole dish. Bake at 350°F for ... to brown the onions.
Place drained green beans in a 1 1/2 quart casserole dish. Break cheese slices into ... green beans. Pour mushroom soup over all. Bake at ... instead of green beans.