Spinach Casserole - cooking recipe

Ingredients

1 lb. hamburger
1 (10 oz.) pkg. frozen chopped spinach
1 large onion, chopped
1 (8 oz.) carton sour cream
1 tsp. oregano
1 can celery or mushroom soup

Preparation

Pour mixture over top of meat in pan and mix well.
Top with Mozzarella cheese slices.
Bake in 350\u00b0 oven until cheese melts, about 1/2 hour.