In a mixing bowl, combine the sliced beef, soy sauce, garlic, ginger, and cornstarch. Let it marinate for at least 30 minutes.
Preheat your air fryer to 400°F.
Toss the broccoli with a little oil and set aside.
Once marinated, place the beef in the air fryer basket in a single layer and cook for 10 minutes, shaking halfway.
Add the broccoli to the basket and drizzle with sesame oil. Cook for an additional 5 minutes until the broccoli is bright green and the beef is cooked through.
Give it a good toss and serve immediately over rice or noodles.
Notes
If you like your broccoli a little softer, add it to the air fryer earlier than the beef.
Experiment with different marinades! The world is your oyster when it comes to flavours.