Manicotti Casserole - cooking recipe

Ingredients

1 (8 oz.) box manicotti shells, cooked
1 lb. or more ground beef
1 large onion
8 oz. can mushrooms
1/2 c. green pepper
1/2 c. celery
8 oz. Mozzarella cheese, ground
8 oz. Colby or Cheddar cheese, ground
1 (16 oz.) spaghetti sauce

Preparation

Brown meat and drain grease off.
Mix cheeses and meat together.
Stuff the cooked shells with mixture.
Cover cake pan with spaghetti sauce and put shells on top.
Cover with more sauce.
Cover pan.
Bake 30 to 40 minutes at 350\u00b0.