Peel and boil potatoes until tender. Drain. Add all remaining ingredients and mash. Put potatoes in casserole ... Cover with foil. Make up to 24 hours ahead. To serve, reheat in 350 degree oven.
Lightly butter 9x14 inch oval baking dish. Boil potatoes until tender, drain. Mash with electric mixer. Add sour ... prepared 2 days ahead. Keep refrigerated.
Ingredients: 7 (chunks .. cream .. milk .. salt .. temperature ...)