Preheat oven to 450. Beat egg whites until foamy. Toss julienned potatoes with egg whites in a medium bowl. Strain any excess egg white off fries using a fine mesh strainer. Arrange fries in a single layer on a parchment-lined baking sheet, assuring they are not touching. Sprinkle with salt and pepper. Bake at 450 for 20 min or until cooked through and crispy on the outside.