Cracker Barrel Hash Brown Casserole

Every time I go to Cracker Barrel, I have to order these potatoes.  This is a pretty close copy-cat recipe.

Cracker Barrel Hash Brown Casserole
2 lbs frozen southern style hash brown potatoes
2 cups sour cream
1 10 1/2 ounce can cream of chicken soup
1/2 cup butter or margarine
1/2 cup chopped onions
2 cups grated cheddar cheese
salt & pepper
Place potatoes in greased 9 x 13-inch pan.  Season with salt and pepper.  In bowl, combine onions, sour cream, and cream of chicken soup.  Pour soup mixture over potatoes.  Sprinkle with cheddar cheese and melted butter.  Bake in 350°F oven for 45 minutes or until cheese is melted.