“Gyoza” is one of my favorite Japanese/Asian food. And I say “Asian” because this food comes from China where Gyoza is called “Jiaozi”.
Gyoza/Jiaozi typically consist of a ground meat and/or vegetable filling wrapped into a thinly rolled piece of dough, which is then sealed by pressing the edges together or by crimping. – Wikipedia
The Chinese “Jiaozi” are usually filled with meat or vegetables and they are prepared boiled or steamed, in the case of the Japanese “Gyoza” the preparation is very similar but they are fried and usually have more garlic.
Japanese style fried “Gyoza”.