Boil potatoes in jackets until they are soft and then chill overnight.
The next day, peel and grate the potatoes by hand and set aside.
Melt margarine in a large, non-stick pan and then add cheese until melted.
Add rest ingredient except potatoes and heat until blended.
Then combine potatoes with mixture and pour into a butter 9 X 13 inch dish.
Bake uncovered at 325 for 1 hour.