2 (6 oz.) pkg. frozen hash browns
1/2 c. melted butter
1/2 c. chopped onion
1 can cream of chicken soup
2 c. shredded Cheddar cheese
2 c. Post Toasties cereal, crushed

Brown hash browns and onions in oil. Place in 9 x 13 baking dish. Mix sour cream and soup; pour over hash brown mixture. Sprinkle cheese. Mix cereal and butter and sprinkle over top.

Bake at 350°F for 30 minutes.