In a large bowl, combine the egg whites, poultry seasoning and pepper. Crumble turkey over mixture and mix well. Shape into six patties.
Using long-handled tongs, moisten a paper towel with cooking oil and lightly coat the grill rack. Grill burgers, covered, over medium heat or broil 4 in. from the heat for 5-7 minutes on each side or until a thermometer reads 165° and juices run clear. Serve in buns with toppings.