Vegan Crispy Wing Gyoza

Name: Vegan Crispy Wing Gyoza
Ingredients: For the Gyoza; 40 gyoza dumpling wrappers; 12 dried shiitake mushrooms; 4 dried black fungus; 12 scallions, finely chopped; 1 yellow onion, finely minced; 1/2 cup carrots, finely chopped; 4 cloves garlic, finely minced; 2 teaspoons ginger root, peeled and finely minced; 2 tablespoons vegetable oil, for frying; 2 tablespoons light soy sauce; 1 teaspoon fine salt; 2 teaspoons mushroom bouillon; 2 teaspoons toasted sesame oil; 1 pinch white pepper; 2 tablespoons cornstarch (optional); For the crispy wings (per 6-8 gyoza); 1 tablespoon vegetable oil (or other neutral oil); 1/4 cup water; 1 teaspoon all-purpose flour; 1 teaspoon cornstarch; 1/4 teaspoon rice vinegar (or distilled vinegar); 1 pinch fine salt; For the dipping Sauce; 2 tablespoons soy sauce; 2 tablespoons rice vinegar; 1/4 teaspoon toasted sesame oil (optional)