Pre-heat the oven to 425 degrees F. Spray the roasting tray with non-stick cooking spray. Dip each eggplant slice in the egg whites coating completely, and place on the tray. Sprinkle the parmesan cheese on each slice. Bake the slices for about 15 minutes or until the cheese has melted. Coat the slices with the tomato sauce and cover with the mozzarella cheese. You can stack the slices as well. Place the tray back into the oven and bake until the cheese has melted. Serve with a grind of black pepper and a sprinkle of fresh basil.