1 can cream of potato soup
1 (16 oz.) pkg. hash brown potatoes, thaw & crumble
1 c. sour cream
1/2 c. onion, chopped
1 c. grated Cheddar cheese

Mix all ingredients except cheese. Use 1/2 of cheese now and reserve the other half to top with the last few minutes of baking time. Bake at 350 degrees for 45 minutes.