Heat a large nonstick skillet coated with cooking spray over medium-high heat. Add potato; sauté 5 minutes or until golden brown, and sprinkle with salt and pepper.
Combine the egg whites, eggs, goat cheese, and smoked salmon in a medium bowl, and stir well with a whisk. Spread the egg mixture evenly over the potato in skillet, and cook 2 minutes or until edges are set and bottom is lightly browned. Sprinkle the top with dill.
Bake at 350° for 5 minutes. Broil 3 minutes or until center is set. Carefully loosen frittata from skillet with a spatula; gently slide frittata onto a platter. Cut into 4 wedges.