Use a knife to finely chop 200 g shrimp until it reaches a paste-like constancy. (Feel free to leave some small chunks in there for extra texture.)
Add the shrimps to a mixing bowl along with ⅛ tsp ground black pepper, 1 tsp soy sauce, 1 tbsp sake, 3 cloves grated garlic, 1 tsp grated ginger root, 1 tsp scallop stock powder, ½ tbsp cornstarch, 30 g garlic chive(s) and 50 g yellow onion(s). Mix until all the ingredients are evenly distributed.
Hold a gyoza wrapper in you palm and add 1 tbsp of the filling. Spread it evenly over the wrapper leaving a border around the edge.
Damped the edge with water and fold the wrapper in half (without letting the sides touch yet). Pinch one corner to start the pleat.
Fold and press to make the pleats until the gyoza is sealed.
Heat a frying pan on medium and add 1 tbsp cooking oil. Once hot, place the gyoza in the pan with the flat facing down and fry until the bottoms are browned (approx 3-5 minutes).
Once browned, pour 150 ml freshly boiled water around the gyoza and place a lid on top. Cook until the liquid is almost gone and then remove the lid.
Continue to cook until the liquid is completely gone and then remove the pan from the heat.
Mix 1 tbsp ponzu sauce, 1 tsp soy sauce, ½ tsp sesame oil and ¼ tsp chili oil in a small bowl. For an extra kick, feel free to add some chopped dried red chili pepper.
Flip the gyoza onto a serving plate, drizzle with lemon juice and enjoy with your homemade dipping sauce!