Instructions:
- Marinate the Beef: In a bowl, mix the thinly sliced beef with soy sauce, oyster sauce, cornstarch, and black pepper. Let it marinate for at least 15 minutes.
- Cook the Vegetables: Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat. Add the sliced bell peppers and onion. Cook for about 3-4 minutes, or until they are just tender but still crisp. Remove the vegetables from the skillet and set aside.
- Cook the Beef: In the same skillet, heat the remaining tablespoon of vegetable oil. Add the minced garlic and sauté for about 30 seconds. Then add the marinated beef slices. Cook for about 2-3 minutes, or until the beef is browned and cooked through.
- Combine: Add the cooked vegetables back to the skillet with the beef. Stir everything together and cook for another minute.
- Serve: Serve the pepper steak over cooked rice.
Enjoy your pepper steak dinner! Feel free to adjust the seasonings according to your taste preferences.