Preheat oven to 350 degrees. Mix potatoes, 1/2 c. butter, onion, salt, pepper, sour cream, and cheese and spread into a 3 qt. casserole dish. Bake 45 minutes, covered. Meanwhile, mix topping ingredients. Place on top of potatoes and bake 10 more minutes uncovered, until golden brown.
Not a NESTLÉ®-tested recipe.