Vegetarian sansho dumplings are usually made from vegetarian ingredients such as vegetables and tofu, and take a relatively short time to cook. Place the vegetarian dumplings in boiling water and cook for about 5-8 minutes to cook through. The exact cooking time will vary depending on the size and thickness of the dumplings. It is recommended to keep an eye on the dumplings as they cook, and observe that the skin becomes transparent and the filling is hot. If you are not sure if the gyoza are cooked, take out one gyoza and test it to make sure the inside is cooked before continuing to cook the rest of the gyoza. Remember to keep the water boiling while cooking and gently stir the dumplings to prevent them from sticking together.