Melt butter or margarine in skillet. Add potatoes and stir lightly over low heat until fat is absorbed. Add the milk and continue cooking until sauce thickens. Season with salt and pepper. Add cream and cook 1 or 2 minutes until of creamy consistency. Potatoes prepared in this way may be placed in a casserole, covered with buttered crumbs or grated cheese, and baked in a hot oven (450 F.) until lightly browned. Yield: 10-12 servings.