Method

• 1.
  Reserve 1/4 cup (35g) flour and place the remaining flour in a bowl. Add 1/4 cup (60ml) boiling water and stir to combine. Gradually add another 1/2 cup (125ml) boiling water, stirring until a dough just begins to form. Add 1/4 cup (60ml) cold water and the oil and stir to combine.
• 2.
  Transfer dough to an electric mixer fitted with a dough hook and knead for 5-6 minutes until smooth and elastic, adding the remaining flour if the dough is too sticky. Enclose in plastic wrap and set aside to rest for 30 minutes.
• 3.
  For the filling, combine all ingredients in a bowl and season well. Set aside.
• 4.
  Divide the dough into 4 equal pieces and roll each piece into a log about 3cm in width. Cut the dough into pieces about the size of a golf ball.
• 5.
  On a lightly floured surface, roll the balls out until 2mm thick and cut out 10cm circles. Top a dough round with 1 tablespoon filling, and bring the edges together to form a dumpling, pinching the tops to seal. Repeat with remaining dough and filling, keeping the filled dumplings covered with a damp tea towel while you make the rest.
• 6.
  Arrange cabbage leaves in a steamer. In batches, arrange the dumplings in the steamer and steam for 8-10 minutes until cooked through.
• 7.
  Combine the black vinegar and ginger in a small bowl and serve with the dumplings and sliced chilli.