Get ready for the dough!
Place the flour and the salt in a bowl
Slowly pour in the water and knead the dough until it becomes smooth and solid
Wrap the dough with nylon and let it rest for half an hour
Now for the filling...
Chop the mushrooms
Cut the carrot into really thin stripes and chop them to a maximum length of 1cm
Chop the cabbage and cut them into pieces not longer than 1cm
Chop the green onion
Place all the chopped vegetables into a bowl and add the teriyaki sauce and the mirin
On a floured surface - roll the dough it very thin to a thickness of 1mm (until it becomes almost see-through)
Heat the oil in a pan (ready for the deep frying!) - the Gioza has go into the fryer as soon as they have been folded!
With the help of a knife, cut the dough into squares (length of approx 4-5 cm)
Place a teaspoon of filling in the middle of the dough
Close the dough in half (from corner to corner) into a triangle and press the dough down so there is no air bubbles left inside
Take the corners of the base of the triangle and close them together
Now carefully place the Gioza in the oil and fry until browning
Remove from the oil and place on kitchen paper
They're ready! Enjoy!