In a mixing bowl, combine soy sauce, oyster sauce, honey, and cornstarch, whisking until smooth. Add chicken, coat well, cover, and marinate for at least 30 minutes.

Heat a large skillet over medium-high heat and add oil. Add the marinated chicken, sear for 5-7 minutes until cooked through, then let it rest.

In the same skillet, sauté chopped onions and bell peppers for 4-5 minutes until tender and fragrant.

Slice the rested chicken into bite-sized pieces and add it back into the skillet with the vegetables. Toss together and cook for 2-3 more minutes.

Transfer to a serving dish, garnish with extra cracked black pepper if desired, and serve hot alongside rice or steamed veggies.