Supreme Broccoli Casserole

Ingredients

• 1 stick margarine
• 2 celery stalks, chopped
• 1 can cream of mushroom soup
• 1 roll prepared garlic cheese
• 2 boxes frozen broccoli, chopped
• 1/2 cup onion, chopped
• 1 cup bread crumbs
• 1 can sliced mushrooms
• salt and pepper to taste