Bacon And Egg Casserole

1/4 c Margarine, melted
2 c Onion/garlic croutons
2 c Milk
1 tb Prepared mustard
2 c Unseasoned croutons
2 c Cheddar cheese, grated
6 Eggs
10 Slices bacon

Cook bacon crispy and crumble. Coat a 9x12x2 casserole dish with vegetable spray. Place croutons in casserole and pour margarine over them. Sprinkle grated cheese over all. Mix milk, eggs and mustard and pour over cheese. Sprinkle bacon crumbs over all. Bake at 325 degrees F for 45 minutes. Allow casserole to stand for 15 minutes.