In large bowl of hot water soak rice noodles for 15 minutes and drain well.
Using a wok or large skillet heat oil. Add the garlic, ginger, scallions, and chile, stir fry for approximately one minute. Stir in the chicken and chicken livers and stir fry over high heat for 2-3 minutes or until browning begins.
Add celery and carrot to chicken mixture, stir fry for about 2 minutes or until they soften. Stir in napa cabbage, lime juice, fish sauce, and soy sauce. Begin adding noodles while stirring and heat thoroughly. If desired sprinkle with shredded mint and pickled garlic. Place on serving dish, optional garnish sprig of mint , and serve immediately.