Combine all the ingredients for the sauce in a small bowl and thoroughly whisk together. Set aside.
In a large mixing bowl, combine the pork, garlic, ginger, scallions, HALF of the cabbage and the beaten egg. Mix well using your hands in ONE DIRECTION until fully incorporated.
Spread a tablespoon of the filling in a thin layer onto one side of a wrapper. Repeat until filling is gone.
Heat a large flat-bottomed skillet or griddle over med-night heat.
Carefully place 3-4 wontons, meat side down on the skillet. Avoid overlapping the edges. Give it a light press with a spatula to ensure a good sear. Cook for 2 minutes, or until the pork is cooked through and there is no pink.
Flip and cook the wrapper side down for 60-90 seconds or until golden brown and crispy. Remove to a paper towel lined plate or tray and repeat until all the dumplings/wontons are cooked. Serve with dipping sauce.