Creating delicious Black Pepper Chicken is straightforward. Just follow these easy steps:

1. Marinate Chicken: In a bowl, combine sliced chicken with black pepper, soy sauce, oyster sauce, and cornstarch. Let it marinate for at least 10 minutes.
2. Heat Oil: In a large skillet, heat vegetable oil over medium heat.
3. Sauté Garlic: Add minced garlic to the skillet and sauté until fragrant, about 30 seconds.
4. Cook Chicken: Add the marinated chicken to the skillet. Cook until the chicken is no longer pink, about 5-7 minutes.
5. Add Vegetables: Stir in sliced onion and bell pepper. Cook for an additional 5 minutes until the vegetables soften.
6. Season: Taste and add salt if necessary, adjusting according to your preference.
7. Garnish: Once fully cooked, remove from heat and garnish with chopped green onions.
8. Serve: Transfer to a serving dish, ready to enjoy.

By following these steps, you can whip up this incredible dish in just half an hour!