POTATO CHEESE PUFF

1 cup water
2 tb butter
1/2 tsp salt
1/3 cup milk
1 package (4 servings) instant mashed potatoes
2 eggs slightly beaten
1/2 cup shredded sharp cheddar cheese
pinch of cayenne pepper (optional)
1 tb grated parmesan cheese

Bring water, butter and salt to boil; remove from heat. Stir in milk and potatoes; cool slightly. Beat in eggs, cheddar and cayenne until well blended. Turn into well greased 1qt casserole; sprinkle top with parmesan. Bake in a preheated 400 F oven, 25 to 30 minutes, until golden, puffed and set. Serve at once. Makes 4 servings.