2 c. hot mashed potatoes (about 2 lg. potatoes)
1/2 c. sour cream
3 oz. grated sharp cheddar cheese (about 1 c.)
4 eggs, separated
Salt and pepper
3 tbsp. chopped chives, or scallions
Cream of tartar

In blender, beat mashed potatoes with next 3 ingredients and egg yolks. Blend for approximately 2 minutes. Stir in chives or scallions. Beat egg whites with a little salt and cream of tartar until stiff. Fold carefully into potato mixture and pile into souffle dish that has been buttered. Bake in preheated oven at 350 degrees about 45 minutes. Serve at once.