Preheat oven to 350°. In a small bowl, combine stuffing and enough broth to reach desired moistness; press onto the bottom and up the sides of a greased 9-in. deep-dish pie plate. Bake until lightly browned, 10-15 minutes., In a large bowl, beat cream cheese and gravy until smooth. Stir in the turkey, broccoli, Swiss cheese, salt and pepper. Spoon over crust., In a small bowl, combine potatoes and cream; spread over turkey mixture. Drizzle with butter. If desired, sprinkle with onions. Bake until heated through and lightly browned, 20-25 minutes.