1. In a bowl, combine the soy sauce, oyster sauce, honey, and cornstarch. Stir until well mixed and the cornstarch is dissolved.
Add the sliced beef to the marinade, ensuring each piece is well coated. Let it marinate for at least 15 minutes, or longer if you have time.
2. Blanch the broccoli florets in boiling water for about 2 minutes until they are bright green and slightly tender. Drain and set aside.
3. Heat 1 tablespoon of olive oil in a large skillet or wok over high heat. Add the marinated beef in a single layer, allowing it to sear and brown without stirring for about 1-2 minutes. Then stir-fry the beef until it's nearly cooked through and remove it from the skillet.
4 In the same skillet, add the remaining tablespoon of olive oil. Add garlic and ginger, and sauté for about 30 seconds until fragrant.
5. Return the beef to the skillet along with the blanched broccoli. Pour the remaining marinade and water (or beef broth) over the top. Stir everything together and cook for another 3-4 minutes until the broccoli is heated through and the sauce has thickened slightly.
6. Serve the beef and broccoli hot, over a bed of brown rice or quinoa for a complete meal.