Add the egg and grated ginger, then massage until fully absorbed.
1 egg, 1 teaspoon ginger
Add the flour and potato starch, then massage until every piece is evenly coated.
1 teaspoon flour, 75 g potato starch
Add the sesame oil and neutral oil, then massage one last time. Transfer to a bag and refrigerate overnight.
1 teaspoon sesame oil, 1 teaspoon neutral oil
Frying
Take out the chicken. If any liquid has collected, add a little more starch to coat it again.
Heat the frying oil to 160-170 °C. Open up the pieces and stretch the skin without tearing it, then lower the chicken into the oil.
frying oil
Fry for about 1 minute 30 seconds, removing the pieces as soon as they turn golden. Let them rest on a rack for 30 seconds to 1 minute.
Increase the heat and bring the oil to 180 °C. Return the chicken to the oil and fry for about 3 minutes. Drain and serve immediately with the zangi sauce.
Zangi sauce
Thinly slice the leek, then mix it with the rice vinegar, soy sauce, sugar, salt, black pepper, MSG, sesame oil, and grated ginger.