In a large bowl, combine ground turkey with onions, cabbage, pressed garlic, sesame oil, soy sauce and ground black pepper.
Place an equal portion of filling into each wrapper.
Brush the endges with water using your finger and seal the filling on the inside (see detailed instructions above).
Place them on a baking sheet, leaving space between each one to avoid them sticking togehter.
Preheat a skillet over medium-high with oil. Place gyoza in a skillet and pan fry until it turns golden brown -- about 3 minutes. Add water and cover with a lid and steam for 3-4 minutes to cook the filling.
Serve with your favortie sauce while gyoza is still nice and warm.