Spread evenly defrosted hash brown in 12x9 casserole dish.
Mix together well: soup, onion, sour cream, salt, cheese and one stick of margarine / butter melted Spoon over top of potatoes spreading evenly.
Optional: mix all ingredients together before putting in dish.
Top with crushed corn flakes and drizzle with 1 stick melted margarine / butter.
Bake 40 -45 minutes at 350.