Peel potatoes and cut in half. Place in saucepan and cover with water. Add a dash of salt and slowly boil until a fork-test shows they are tender. Drain and put in a bowl; mash and mix with mixer. Add butter, sour cream and salt and pepper and beat with mixer until smooth. Spoon in chives. Spoon mashed potatoes into greased two-quart casserole dish and top with cheese. Bake in a 325 degree oven until potatoes are heated thoroughly and cheese is melted, about 20-30 minutes.

Serves 6. Recipe doubles easily.