Super Duper Potatoes
["9 medium potatoes (unpared)", "1/2 c. margarine", "2 c. half and half", "1 Tbsp. salt", "1/2 c. grated Cheddar cheese"]
["Boil potatoes in jackets until tender.", "Chill potatoes 48 hours.", "Remove skins and grate potatoes.", "Heat margarine, half and half and salt in a 3-quart saucepan until margarine melts.", "Mix together with grated potatoes and cheese.", "Pour into a 2-quart baking dish.", "Bake at 350\u00b0 for 1 hour and 15 minutes.", "If desired, sprinkle grated cheese over top for last 15 minutes."]
["potatoes", "margarine", "salt", "Cheddar cheese"]