Potato Salad and Egg Whites Sandwich

I should call this a Thankgiving Day Leftovers sandwich.
I make this sandwich using potato salad from a deli.
You can even add a few crisp potato chips into it.

Ingredients:
6 slices bread
butter
1 lb thin sliced deli turkey breast
1 lb deli potato salad
4 egg whites
1/2 tsp salt
1 heaping tbs Dijon Mustard

Directions:
Preheat oven to 450 degrees F.
Butter bread on one side and place
buttered side down on baking sheet.
Distribute sliced turkey on the bread.
Then mound each with some of the potato salad.
Beat whites with the salt till stiff and fold in mustard.
Top the sandwich with the egg whites.
Bake watching carefully till browned and serve.