Scalloped Potatoes
["2 lb. pkg. frozen hash browns", "1 can cream of celery soup, undiluted", "1 c. sour cream", "1 stick margarine", "2 c. shredded cheese", "1 tsp. salt", "1/4 tsp. pepper", "chopped onion (if desired)", "crushed cornflakes"]
["Spray bottom of 9 x 11-inch pan with Pam.", "Spread hash brown potatoes over bottom of pan."]
["frozen hash browns", "cream of celery soup", "sour cream", "margarine", "shredded cheese", "salt", "pepper", "onion", "cornflakes"]