Hash Brown Casserole

2 lbs. Frozen hash browns
¼ tsp. Pepper
1 can cream of chicken soup, undiluted
¼ cup margarine, melted
1 tsp. Salt
½ cup chopped onion
½ pint sour cream
1 cup shredded cheddar cheese
2 cups crushed corn flakes

Place hash browns, pepper, soup, margarine, salt, onion, sour cream and cheddar cheese in a 13 x 9-inch casserole dish. Top with crushed corn flakes. Bake at 350 degrees for 45 minutes.