Separate the napa cabbage leaves one by one and wash them thoroughly.
Remove excess water from the tofu and mash it.
Finely chop the onion, carrot, and garlic chives.
In a bowl, combine the mashed tofu, minced pork, onion, carrot, garlic chives, salt, pepper, and sesame oil to prepare the dumpling filling.
Place a suitable amount of filling on each napa cabbage leaf and wrap it into a dumpling shape.
Bring water to a boil in a steamer, place the cabbage dumplings inside, and steam for 10 minutes.