1. Chop chicken and place pieces in a large bowl.
2. Add in 1 tablespoon of soy sauce, half a teaspoon of sugar, half sesame oil, a pinch of salt, and a pinch of pepper, combine, and let marinate for 20 to 30 minutes.
3. In another bowl, combine chicken stock, the rest of the soy sauce, the white vinegar, the rest of the sugar, and the cornstarch.
4. Heat a wok over high heat.
5. Once hot, add in half the vegetable oil and the chicken, cooking for 3 to 5 minutes, stirring regularly to ensure it browns on all sides.
6. Once the chicken is cooked, remove it from heat, place it in a bowl, and set aside.
7. In the hot empty wok, add in the rest of the vegetable oil, onions, bell peppers, and celery for 2 to 4 minutes, stirring regularly.
8. After that time, toss in the chopped peanuts, garlic, and ginger stirring to combine for approximately 1 minute.
9. Return the chicken to the wok and pour the sauce over everything, stirring and cooking for another 1 to 3 minutes; until the sauce thickens.
10. Once everything is combined and cooked, serve, top with the green onions, and enjoy!
