Pork and Shiitake Gyoza recipes

Name: Pork and Shiitake Gyoza recipes
Ingredients: 10 oz (300g) ground pork (80% lean, 20% fat preferred); 1/2 cup cabbage, finely chopped; 1 stalk scallion, finely chopped; 3-4 dried shiitake mushrooms or fresh shiitake mushrooms; 1 pack gyoza wrapper; 1 tablespoon oil; 1/2 cup water, for steaming; 1/4 cup water, for sealing; 1 tablespoon cooking sake; 1 teaspoon mirin; 1/2 teaspoon salt; 1 teaspoon soy sauce; 1/2 teaspoon sesame oil; 3 dashes white pepper powder; 4 tablespoons ponzu; 1 teaspoon chili oil (optional); 1/2 teaspoon white sesame seeds