Hamburger Rice Casserole

1 lbs ground beef
1 onion, chopped
1/2 cup celery, chopped
1 can evaporated milk
1 can cream of mushroom soup
1 cup instant rice
3 slices bread, cubed
3 tbsp butter, melted

Brown meat with onion and celery, drain.
Mix in milk, soup and rice and pour into casserole dish.
Bake at 350F for 30 minutes.
While baking, coat bread cubes with butter and top casserole with cubes and bake until bread is browned (about 10 minutes)