Shiitake mushroom and pork soup dumplings

Ingredients

• 4 (10g) dried shiitake mushrooms
• 1/2 cup (125ml) boiling water
• 1/4 cup (60ml) cold water
• 4 teaspoons powdered gelatine
• 1/2 cup (125ml) chicken stock
• 4 green onions (scallions), halved
• 1 1/2 teaspoon finely grated fresh ginger
• 100 grams minced (ground) pork
• 75 grams minced (ground) chicken
• 1 tablespoon soy sauce
• 1 tablespoon chinese cooking wine (shao hsing)
• 2 teaspoons caster (superfine) sugar
• 1/2 teaspoon sichuan peppercorns, crushed
• 2 tablespoons canned water chestnuts, chopped
• 30 gow gee wonton wrappers chilli sauce and chinese black vinegar, to serve