8 or 9 potatoes
8 oz. grated Cheddar cheese
1 tsp. dry mustard
1 tsp. salt
1/2 pt. heavy cream
1 c. milk
Pepper to taste

Boil potatoes until done. Chill. Grease flat baking dish with butter. Grate potatoes in dish. Cook other ingredients until cheese melts. Pour over potatoes. Dot with butter and paprika. Refrigerate for 24 hours. Bake at 325 degrees for 1 hour and 15 minutes.