Mince cabbage, carrots, onions, shiitake mushrooms, and green onions, then place them in a large bowl.
Add tofu to the bowl and mix lightly.
Add garlic, ginger, miso, soy sauce, salt and pepper, corn starch and sesame oil and mix well. Filling is now complete!
On the center of the gyoza wrapper, place a spoonful of filling. Wet the edge of the wrapper with water and fold the wrappers, keeping the edges sealed shut. The gyoza is ready to be cooked!
Place parchment paper in a steamer and place the dumplings. Steam for 10 minutes. Cook longer if the skin still looks raw.
Serve with soy sauce or chili sauce to enjoy!