Sprinkle the chopped cabbage with a teaspoon of salt and let stand in a colander for 10 minutes. At the end, squeeze out something so that the water flows off.
Then mix the cabbage with the mince, mushrooms, spring onions, oil, ginger, salt and pepper.
Have a bowl of water ready to moisten your hands. Distribute the mixture evenly on the dumpling dough pieces (about 1 tablespoon per dumpling) and fold into the dough pieces, then press together. Repeatedly moisten your fingers with the water.
Then put the dough pieces in a pan and fry them briefly. Then add some water to the pan and steam the dough for about 7 minutes.