1 1/2 lbs. hamburger
1/4 c. bread crumbs
1 egg
1/2 tsp. salt

FILLING:

2 c. mashed potatoes
2 hard cooked eggs, chopped
1/3 c. mayonnaise
1/3 c. grated Parmesan cheese
1/4 c. finely chopped celery
2 tbsp. green onion slices
Salt and pepper to taste

SAUCE:

1 c. mayonnaise
1/3 c. milk
1/4 tsp. horseradish
2 tbsp. green onion slices

Mix meat mixture together for meat loaf. Pat on foil to 8x14 inch rectangle. Cover with potato mix. Roll meat (don't roll foil in with it or you'll have a mess) in jelly roll fashion, and chill until firm, with foil wrapped around it.

Poke holes in bottom of foil and bake at 350 degrees on broiler pan for approximately 25 minutes. Heat sauce gently before serving.