1 Melt butter in sauté pan.2 Add onion; cook until softened, about 5 minutes. Set aside.3 In mixing bowl, combine sour cream, milk, cheese, salt and pepper. Gently mix together.4  Fold in potatoes and onion. Spray half-size hotel pan with vegetable oil. Spread potato mixture evenly in pan.5  Combine topping ingredients in bowl; mix well.6 Sprinkle over potato mixture. Bake in 350°F oven, uncovered, until bubbling hot, about 30 minutes.

Source: Idaho Potato Commission