Place chicken wings in a large bowl and sprinkle with pepper and salt then refrigerate for 1 hour.

In a shallow pan, add sugar, soy sauce, rice wine vinegar, ginger, and garlic. Heat over medium high until boil. Add the vinegar to the mixture and transfer to a large bowl and allow to cool.

In a heavy bottomed pot, add 2" of oil and heat over medium.

Take the chicken out from fridge and remove moisture from the surface of the chicken with paper towels. Sprinkle potato starch over the chicken and toss to evenly coat each piece.

Fry a batch of the coated chicken for 10 minutes. Transfer them to a plate and finish frying the remainder of the chicken.

Once all the wings have been fried once, increase the heat of the oil to medium high. Fry the chicken for the 2nd time, this time in smaller batches.

Once the wings are golden brown (about 4 minutes), transfer them into the bowl of glaze and quickly toss to coat.

Transfer the glazed chicken to a serving platter, sprinkle sesame seeds and black pepper (optional), and serve immediately.