Brunch Casserole

Directions

1. 1
   Brown sausage and drain well.
2. 2
   Spread in well-greased casserole the frozen potatoes.
3. 3
   Layer sausage over potatoes.
4. 4
   Add a layer of the cheese.
5. 5
   Beat the eggs, 2 1/2 cups of milk and mustard with salt.
6. 6
   Pour over cheese.
7. 7
   Mix the soup and 1/2 cup of milk and sliced mushrooms.
8. 8
   Layer over eggs.
9. 9
   Cover and refrigerate 24 hours or just overnight.
10. 10
    Bake at 350° for 1 1/4 hours.
11. 11
    Let set 10 to 15 minutes before serving.