Cheesy Potato Souffle
["3 medium-size red potatoes (1 1/2 lb.), peeled and sliced", "1/2 c. sour cream", "4 eggs, separated", "2/3 c. shredded Cheddar cheese", "1/4 c. diced onion", "2 tsp. chopped chives", "1/4 tsp. pepper", "1/8 tsp. baking powder"]
["Cook potatoes in boiling salted water to cover 8 minutes or until tender.", "Drain and mash potatoes.", "Add sour cream; beat at medium speed of an electric mixer until smooth.", "Beat egg yolks until thick and lemon colored.", "Add yolks, cheese, onion, chives and pepper to potato mixture; stir well.", "Beat egg whites (at room temperature) and baking powder until stiff peaks form.", "Fold into potato mixture.", "Spoon into a buttered 1 1/2-quart souffle dish. Bake at 350\u00b0 for 50 minutes or until set.", "Serve immediately. Yield: 6 servings."]
["red potatoes", "sour cream", "eggs", "Cheddar cheese", "onion", "chives", "pepper", "baking powder"]