1 (32 oz.) bag frozen hash brown potatoes
1 pt. sour cream
1 can cream of chicken soup
1/2 c. chopped onion
4 oz. shredded Mozzarella cheese
4 oz. shredded cheddar cheese
1 tsp. salt
1/4 tsp. pepper
1 stick butter, melted
2 c. crushed corn flakes, for topping

Defrost potatoes. Grease a 13 x 9 inch baking pan. Combine all ingredients, except topping. Mix gently. Sprinkle corn flakes on top. Bake at 350 degrees for 45 minutes.