Creating Pepper Steak with Bell Peppers and Onion can be quick and enjoyable if you follow these simple steps:

1. Prep the Ingredients: Start by slicing the beef, bell peppers, and onion. Mince the garlic and set everything aside.

2. Marinate the Beef: In a medium bowl, toss the beef slices with soy sauce, oyster sauce, cornstarch, and a sprinkle of salt and pepper. Let it marinate for about 10 minutes.

3. Heat the Oil: In a large skillet or wok, heat vegetable oil over medium-high heat until hot.

4. Cook the Beef: Add the marinated beef to the skillet in a single layer. Cook for about 2-3 minutes or until browned. Make sure not to overcrowd the skillet; cook in batches if necessary.

5. Add Vegetables: Once the beef is cooked, remove it from the pan and set it aside. In the same skillet, add a little more oil if needed, then add the sliced bell peppers and onion. Stir-fry for about 3-4 minutes until the vegetables are tender but still crisp.

6. Add Garlic: Stir in the minced garlic and cook for an additional minute until fragrant.

7. Combine and Finish: Return the beef to the skillet. Pour in beef broth and toss everything together. Cook for a few more minutes until the sauce slightly thickens.

8. Adjust Seasoning: Taste and adjust seasonings, adding more soy sauce, salt, or pepper as needed.

9. Serve: Remove from heat and drizzle with sesame oil for added flavor.