Marinate the Beef: In a mixing bowl, combine the sliced beef with soy sauce, oyster sauce, cornstarch, olive oil, minced garlic, and ginger. Let it marinate for at least 10 minutes.
Prepare the Broccoli: While the beef is marinating, wash and cut the broccoli into bite-sized florets.
Preheat the Air Fryer: Set your air fryer to 400°F (200°C) for about 5 minutes.
Cook the Beef: Place the marinated beef in the air fryer basket in a single layer. Cook for 8 minutes, shaking the basket halfway through.
Add the Broccoli: After 8 minutes, add the broccoli florets to the basket with the beef. Season with salt and pepper. Cook for an additional 5-7 minutes, or until the broccoli is tender and the beef is cooked to your liking.
Serve: Once cooked, transfer the Beef and Broccoli to a serving dish and sprinkle with sesame seeds. Enjoy hot!