Sour Cream Mashed Potatoes

Directions

1. 1
   Cook potatoes in salt water, mash but do not add milk.
2. 2
   Grease casserole with butter.
3. 3
   Combine all ingredients, put into casserole dish and sprinkle heavily with grated Parmesan cheese. Dot with butter.
4. 4
   Refrigerate overnight.
5. 5
   (This brings out the flavor.)
6. 6
   Take out of refrigerator 1/2 hour before baking.
7. 7
   Bake in 350° oven for 1/2 hour or longer until top is golden brown.