Pork Scallion Pot Stickers

Name: Pork-Scallion Pot Stickers
Ingredients: 1/2 pound ground pork; 2 cups finely chopped green cabbage; 1 cup thinly sliced scallions (about 5 large); 1 1/2 tablespoons minced fresh ginger; 3 garlic cloves, minced; 2 shiitake mushrooms, stems discarded and caps finely chopped; 1 tablespoon toasted sesame oil; 1 tablespoon soy sauce, plus more for dipping; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground white pepper; 1 package round gyoza wrappers (48); 1/4 cup vegetable oil; 1 cup water