My name is Inés, I'm from Barcelona, and my recipe is gyoza , is originally a Chinese dish that has also become very popular in Japan.
This ingredient is not available in Western supermarkets, but it should be found in Japanese groceries stores that exist in big European and American cities, for example, Sake.
It is a dish that can be prepared easy.

Ingredients:

170 mL water
200 g strong flour

200 g ground pork
Cabbage
Nira

Leek or Green onion
Garlic
Ginger
Sake
Soya sauce, salt, and pepper
Sesame oil
Dipping Sauce:
Soya sauce
Vinegar

Preparation:
Put some of the filling onto a piece of dough
Moisten the edge of the dough with water.
Moisten only a semicircle.
Close the gyoza. While closing it, fold the edge about 6 times.
Put the gyoza on the table