Spinach and Beef Casserole

1 1/2 pounds hamburger meat
1 package chopped spinach
1 can cream of mushroom soup
Grated cheese for top

Brown hamburger meat. Add spinach and mushroom soup. Stir through. Pour into casserole dish. Bake at 350 degrees until bubbly. Add cheese to top and put back in oven until cheese begins to brown.