Ingredients
Equipment
Method
Instructions
- Marinate the Beef: In a medium bowl, combine the thinly sliced flank steak, soy sauce, and cornstarch. Toss everything together until the beef is evenly coated. Set it aside to marinate for at least 15 minutes.
- Mix the Sauce: While the beef marinates, whisk together the beef broth and oyster sauce in a small bowl. Keep it nearby, as you’ll need it quickly.
- Sear the Beef: Heat 1 tablespoon of vegetable oil in a large skillet or wok over high heat until it shimmers. Add half of the marinated beef in a single layer. Cook for 1-2 minutes per side until nicely browned but still slightly pink inside. Remove the beef from the skillet and set it aside on a plate. Repeat with the remaining beef.
- Sauté Vegetables and Aromatics: Add the remaining 1 tablespoon of oil to the skillet. Add the sliced onion and bell pepper and stir-fry for 3-4 minutes until they begin to soften but are still crisp. Add the minced garlic and ginger and cook for another minute until fragrant.
- Combine and Finish: Return the seared beef to the skillet with the vegetables. Pour the prepared sauce over everything. Stir to combine and cook for 1-2 minutes, until the sauce has thickened slightly and coats the beef and vegetables.
- Serve: Remove from the heat and drizzle with sesame oil. Season with a pinch of salt and pepper if needed. Garnish generously with chopped green onions and serve immediately.
Notes
For extra tender beef, slice it thinly against the grain; freezing the steak for 20-30 minutes can make this easier. Use high heat and cook the beef in batches to get a proper sear and avoid steaming the meat. If the sauce is too watery, thicken it with a slurry made from 1 teaspoon of cornstarch and 2 teaspoons of cold water.
