Preheat oven to 400℉.
Pat dry the chicken wings. In a large mixing bowl, combine the chicken wings with salt and pepper. Add potato starch and toss well until the chicken wings are evenly coated with a dusting of starch. Add more potato starch, if necessary.
Arrange the chicken wings on a parchment paper lined sheet pan, skin side down. Baste or spray wings liberally with cooking oil.
Bake in a preheated oven for 20 minutes. Flip the wings over and bake for another 20 minutes. Turn off the heat and the wings can be left in the oven for another 15-30 minutes This will make the wings even crispier.
If using an air fryer, preheat the air fryer to 400℉ and place some of the chicken wings in the basket. Do not overcrowd. Baste or spray liberally with cooking oil. Cook for 15-20 minutes until desired crispiness, stirring once midway. You may need to do this in multiple batches. Keep the cooked wings warm by placing them in a warm oven.
Meanwhile, make the sauce. In a wok or a small saucepan on low heat add cooking oil, garlic and ginger. Sauté for about a minute until fragrant. Add remaining sauce ingredients and bring to a low simmer. Turn off the heat.
If using a wok, add the cooked wings and toss. Otherwise, place the cooked wings in a large mixing bowl. Pour the sauce over the wings and toss.
Serve on a platter and garnish with sesame seeds.