Gyoza (The Best Recipe!)

Name: Gyoza (The Best Recipe!)
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Cuisine: Japanese
Ingredients: 1 packet store-bought gyoza wrapper; oil (for pan-frying); water (for steaming); 8 oz. ground pork; 2 oz. cabbage, shredded and cut into small pieces; 1 thumb-sized ginger (peeled and grated); 1 clove garlic (peeled and grated); 1/2 tablespoon corn starch; 1 tablespoon soy sauce; 1/2 tablespoon sake; 3 dashes white pepper; 1/2 teaspoon sesame oil; 1 tablespoon chopped scallion (green part only); 1 pinch salt; 4 tablespoons Japanese Ponzu