Creating a delicious Pepper Steak with Bell Peppers and Onion is easy when you follow these simple steps:

1. Marinate the Steak: In a bowl, combine thinly sliced beef steak with soy sauce and cornstarch. Mix well and let it marinate for about 10 minutes.
2. Prepare the Vegetables: While the beef is marinating, slice the onion and bell peppers. Set aside.
3. Heat the Pan: In a large skillet or wok, heat 1 tablespoon of vegetable oil over medium-high heat.
4. Cook the Beef: Add the marinated beef to the skillet in a single layer. Sear until browned, about 2-3 minutes per side. Remove the beef and set aside.
5. Sauté the Vegetables: In the same skillet, add another tablespoon of vegetable oil. Add sliced onion, bell peppers, minced garlic, and ginger. Stir-fry for about 4-5 minutes or until the vegetables are tender-crisp.
6. Combine Ingredients: Return the cooked beef to the skillet. Add oyster sauce (if using), and toss everything together. Cook for an additional 2 minutes to heat through.
7. Season to Taste: Adjust seasoning with salt and pepper as needed. Stir well.
8. Serve: Remove from heat and serve hot over a bed of fluffy cooked rice.

These steps will guide you in creating a delicious home-cooked Pepper Steak with Bell Peppers and Onion effortlessly!