Combine the diced chicken, corn starch, egg white, soy sauce, rice vinegar, and salt in a large bowl. Toss and then let the chicken marinate for about 5 minutes while you prep the other ingredients.
Combine the soy sauce, balsamic vinegar, black pepper powder, cooking wine, and water in another small bowl. Whisk to combine.
In a large skillet, heat the cooking oil over medium heat and then add the chicken. Stir occasionally and cook until crisp and golden on the outside and evenly cooked on the inside (3-4 min). Once done transfer the chicken onto a plate.
In the same skillet, Next heat 2 tbsp oil in a pan, add chopped ginger and garlic and fry until garlic becomes fragrant.
Add the dried red chilies and cubed red and green bell peppers. Stir and cook for a few seconds.
Stir the prepared sauce, then pour it into the pan and bring it to a boil.
In a small bowl mix together the corn starch and water and then add it to the sauce.
Add the green onions, ground black pepper, and cooked chicken to the pan and mix all the ingredients in the sauce until the chicken is evenly coated and the sauce thickens.
Stir in the peanuts, toss well, and cook for another 2 minutes.
Serve hot with rice.