Roughly chop the cabbage, onion, carrot, scallion, and ginger. Add them to a food processor and pulse for about 20 seconds until finely chopped but still slightly textured. Transfer to a large bowl.
Add the chicken to the food processor and pulse for 15–20 seconds until minced but still textured. Add the chicken to the bowl with the vegetables.
Add all the marinade ingredients to the chicken and vegetable mixture and mix well until fully combined.
To assemble the dumplings, place a wrapper in your hand and add about a heaped teaspoon of filling to the centre. Wet the edges with a little water.
Fold the wrapper in half and pinch the centre together. Create small pleats on each side to seal tightly, making sure the dumpling has a flat base.
Heat oil in a non-stick pan over medium heat. Place the dumplings flat side down and fry for 1–2 minutes until the base is lightly golden.
Add water to the pan so it reaches about one third of the height of the dumplings. Cover with a lid and steam for 4–5 minutes.
Remove the lid during the final minute if needed to allow the remaining water to evaporate and the bases to crisp slightly.
Mix all the dipping sauce ingredients together in a small bowl. Serve with the dumplings.