Slice boneless chicken breast thinly and set aside. Add Salt, White pepper powder, oil, 1 tablespoon cornstarch, water. Mix it really well and set aside for five minutes.

Now let's make the sauce. In a small mixing bowl, take chicken stock, soy sauce, vinegar and sugar. Mix well and set aside.

Now for frying the chicken take a wok and Heat some oil for frying. Add 4 tablespoon of cornstarch into the marinated chicken and mix well. Now Add the chicken in hot oil in batches and fry for 30 seconds on high heat. Remove it to a bowl. Now let's double fry the chicken. Reheat the oil till it is nice and hot. Add in the fried chicken and cook on high heat for 30 to 45 seconds. Remove it to a bowl and set aside.

Mix 1 tablespoon cornstarch with 3 tablespoon water. Set aside till use. Now drain all the oil reserving just 1 tablespoon of oil in the wok.

Now Add in chopped ginger and garlic in the wok and sauté for 30 seconds. Pour in the sauce and bring it to a full boil. Add the fried chicken along with some cornstarch slurry and toss well. The corn starch will thicken the sauce and coat the chicken beautifully.

Serve the chicken with a sprinkle of sesame seeds with some rice or noodles.