Dice the corned beef into small pieces. If you are using pastrami, slice into small strips.
Place an egg roll wrapper on a flat surface in a diamond shape. Place 1 tablespoon each of diced corned beef, sauerkraut and Swiss cheese about an inch or so away from the corner closest to you.
Working away from you, fold up the bottom of the wrapper over the top of the filling. Fold in both sides. Brush the end with egg and roll until sealed.
Fry, in batches if necessary, until golden brown.
Tranfer to a paper towel lined plate, sprinkle with salt. Serve with Thousand Island Dressing.
Notes
You can also chose to freeze the egg rolls. To do that place them in a single layer on a baking sheet in the freezer. Once frozen, place in a resealable plastic freezer bag. Thaw before frying. Nutrition information for estimation purposes only.