6 med. potatoes
3 tbsp. butter
1 c. grated Cheddar cheese
1/2 c. milk
1 egg, beaten
Salt

Peel and cook potatoes in slated water. Drain and mash thoroughly. Add butter, cheese, milk and salt. Beat over low heat until butter and cheese is melted. Fold in egg and pour into a greased 2 quart casserole dish or 8x8 pan.

If you don't intend to bake it right away, put it into the refrigerator and bake next day. Bake 350 degrees for 30 minutes or until puffy and golden brown.