In a mixing bowl, combine soy sauce, oyster sauce, and cornstarch. Stir in sliced flank steak, cover, and refrigerate for at least 30 minutes.
Heat 1 tablespoon of vegetable oil in a wok over high heat. Stir-fry beef slices for 2-3 minutes or until browned. Remove and set aside.
Add another tablespoon of oil and toss in broccoli florets. Stir-fry for 3-4 minutes until vibrant green and tender-crisp.
Return beef to the wok with the broccoli, add ginger and garlic, and stir until aromatic. Add beef broth and drizzle with sesame oil, stir-fry for 2-3 minutes until the sauce thickens.
Notes
Leftovers store well; cool completely before refrigerating up to 4 days or freezing up to 2 months.
Keyword Asian Cuisine, Beef Broccoli, Copycat Recipe