Place flour and salt in a bowl and gradually add the boiling water and mix well with a spoon
Transfer it to the work surface and kned the dough for 8-10 mins
Portion it to 2 equal pieces and shape it to a long log shape. Cover with cling wrap and leave aside for 30 minutes
Dust the work surface with cornflour and cut the one long log shape dough into 12-13 equal piece. Once cut cover with a damp cloth to avoid to from drying
Take one piece at a time and flatten it using a rolling pin
If you don't get a perfectly shaped round, then use a round-shaped object to cut the dough
Repeat the process for each wrapper. Dust the wrapper with cornflour and cover with a damp cloth to avoid it from sticking together.
Dust cornflour to a baking tray to place the made gyozas
Place 1 gyoza wrapper on your palm. Dip your finger in water and run it around the edge of half the gyoza wrapper. Place 1 tbsp of filling on the middle of the wrapper. Fold the wrapper over. Use your thumb to create 4 pleats. Press to seal and place on the tray. Repeat with remaining wrappers.