Put pie crust in glass pie dish. Layer carrot, potatoes,stuffing mixture, then chicken, pour some gravy to moisten. Keep repeating, mixture, chicken, a bit of gravy. It will be quite high and full. Top with crust and brush with beaten egg. Bake at 425 for ten minutes watching for browning. Turn heat back to 350 bake about another 45 minutes or till top is brown and flaky. Let stand for ten minutes. Remember to cover edges with foil so they do not over brown.