Onion Casserole

Directions

1. 1
   Butter a flat 2-quart baking dish.
2. 2
   Boil onions in water until tender; drain.
3. 3
   Line the baking dish with toast, crust removed. Cover with a layer of onions and a layer of grated cheese.
4. 4
   Repeat layer of toast; cover with layer of onions then layer of cheese. At this point casserole may be covered with plastic wrap and stored in refrigerator for the day.
5. 5
   Beat egg slightly and add balance of ingredients.
6. 6
   Pour over casserole.
7. 7
   Bake at 375° for 40 minutes.
8. 8
   Serve at once.