Following these straightforward steps will help you create a delicious Easy Black Pepper Chicken effortlessly:

1. Prepare the Chicken: Start by slicing the boneless chicken breast into thin strips. This will help it cook evenly and quickly.
2. Marinate: In a medium bowl, mix the chicken slices with 1 tablespoon of soy sauce and the cornstarch. Set aside for about 10 minutes to allow the flavors to meld.
3. Heat the Oil: In a large skillet or wok, heat the vegetable oil over medium-high heat until it shimmers.
4. Cook the Chicken: Add the marinated chicken to the skillet in a single layer. Cook for about 3-4 minutes on each side until it’s golden brown and cooked through. Remove the chicken from the skillet and set it aside.
5. Prepare the Sauce: In the same skillet, add the garlic and ginger. Sauté for about 30 seconds until fragrant. Then, add the remaining soy sauce, oyster sauce (if using), and the freshly ground black pepper.
6. Thicken the Sauce: In a small bowl, mix the cornstarch with 1 tablespoon of water. Stir this mixture into the skillet and cook until the sauce thickens, about 2 minutes.
7. Combine: Return the cooked chicken to the skillet. Toss to coat the chicken thoroughly in the sauce and heat for an additional minute.
8. Garnish: Sprinkle chopped green onions over the top before serving for added freshness and color.

Enjoy the incredible aromas that fill your kitchen as you cook!