Do Ahead Mashed Potatoes

Directions

1. 1
   Mash the potatoes and add the margarine and the cheese which has been cut in pieces.
2. 2
   Whip until very smooth.
3. 3
   Drizzle Pet milk and beat until very smooth again.
4. 4
   Fold in a desired amount of onion flakes.
5. 5
   Spray a casserole dish and pile the potatoes in. Top with a little grated cheese.
6. 6
   Cover and refrigerate overnight.
7. 7
   Remove and bring to room temperature and then bake, uncovered, at 350° for about 45 minutes.
8. 8
   Very good!