Combine the flour and salt in a bowl, add boiling, mix vigorously with spatula. Once the dough is cool enough to handle, knead till dough is smooth.
Divide dough into four pieces. Roll each piece out into a sausage. Divide each dough sausage into eight pieces. Roll out each piece of dough to make one wrapper.
Mix pork with nori, cabbage, leek and carrot. In separate dish mix sake, miso, sesame oil, ginger, potato starch, sugar and soy sauce.
Pour liquid into meat filling.
Marinate minimum 30 minutes.
Place 1 teaspoon of filling on each wrapper, seal the edges and shape dumpling.