Lay out a gyoza skin, dip your finger into the water and run it around the border of the circle. Put a teaspoon of the filling into the middle, then bring up the sides. Traditionally, you work from one side towards the middle, 3 pleats, then the other side, another 3 pleats. Only pleat one side, the other side of the crescent will be flat. Press together to seal into crescent shape dumplings.