Wash, peel, and cut potatoes into quarters. Cover with water and boil until tender. To prevent boiling over, place a wooden spoon across the too of pan while cooking.
Clean and chop up scallions and celery to small pieces. Amount can be varied to your tastes.
Fry celery, scallions, and ground beef together.
When ground beef has no red meat left, drain grease off.
When potatoes are tender, drain water carefully, add small amount of milk, salt and pepper, and 3/4 stick margarine and mash.
Take Cream of Celery soup and place in bowl, add about a can of water and mix well.
Combine beef mixture with soup mixture.
In large pyrex bowl, spray with cooking spray, add a later of mashed potatoes, handful of cheese and then beef mixture. Layer again, add a few pieces of butter on top, too with remaining cheese or add more.