Mix the ground pork with soy sauce and 1 teaspoon of the sherry. Set aside for 15 minutes. Heat wok on high. Add vegetable oil and swirl to coat sides. Add garlic and ginger and cook until fragrant, about 5 seconds. Add pork and stir-fry until pork is no longer pink, about 2 minutes. Add green onions, and stir-fry for 1 minute. Add water chestnuts and stir-fry for 30 seconds. Remove from heat. Mix together remaining 3 teaspoons sherry, broth, hoisin sauce, and sesame oil. Add stuffing mix tossing gently until well moistened. Stuff poultry as usual. Makes 6 servings