In a large bowl, combine pork, ginger, garlic powder, scallions, 2 tablespoons soy sauce, and the sesame oil; mix well.
Place 8 wonton wrappers on a flat surface, then place a teaspoonful of pork mixture in center of each. Brush egg around edges of wonton, then fold one edge of wonton over filling, forming a triangle shape. Press edges together to seal, and place on baking sheet. Repeat process with remaining wonton wrappers and filling.
In a large skillet over medium-high heat, heat 1 tablespoon vegetable oil until hot. Cook pot stickers in batches 3 to 4 minutes per side, or until golden brown, adding oil as needed. Add 1/4 cup water and 1 teaspoon of the soy sauce to skillet; cover and steam 3 to 4 minutes, or until water evaporates. Repeat with remaining pot stickers, or place remaining pot stickers in an airtight container and freeze until ready to cook.
Serve over sauteed Chinese cabbage and with some additional soy sauce for dipping.