Au Gratin Potatoes - cooking recipe

Ingredients

4 lb. potatoes
1/4 c. margarine (butter)
1 pt. sour cream
3 Tbsp. butter
1/2 c. crushed cornflakes
1 onion, diced
1 1/2 c. Cheddar cheese, shredded
1 can cream of celery soup

Preparation

Cook
potatoes in skin and cool.
Remove skin and shred coarsely.
Mix
potatoes and cheese in greased 9 x 13-inch pan or large casserole.
Cook onion in 1/4 cup butter until soft. Mix with
sour cream and celery soup.
Pour over potatoes and mix well.
Refrigerate overnight.