In a bowl, combine the steak slices with soy sauce, oyster sauce, and cornstarch. Stir to coat and let marinate for 15 minutes.
Heat oil in a large skillet or wok over high heat. Add the steak in a single layer and sear until browned, about 2 minutes per side. Remove steak and set aside.
In the same skillet, add more oil if needed, then sauté bell peppers and onion until just tender, about 3-4 minutes.
Add garlic and ginger, and cook for an additional minute until fragrant.
Return the steak to the skillet, add beef broth, and stir to combine. Cook for 2-3 minutes until the sauce is slightly thickened.
Season with salt and pepper, then serve hot over steamed rice.
Prep Time: 20 minutes | Cooking Time: 15 minutes | Total Time: 35 minutes
Kcal: 310 kcal per serving | Servings: 4
