Creating delicious Chinese Beef and Broccoli is straightforward and can be achieved by following these simple steps:

1. Prepare the Beef: Slice the flank steak against the grain into thin strips. This ensures tenderness.
2. Make the Marinade: In a bowl, combine the soy sauce, oyster sauce, cornstarch, brown sugar, sesame oil, and beef broth. Stir until the cornstarch is dissolved and set aside.
3. Heat the Pan: Add vegetable oil to a large skillet or wok over medium-high heat.
4. Cook the Beef: Once the oil is hot, add the sliced beef in a single layer. Cook for 2-3 minutes or until browned. Remove from the pan and set aside.
5. Add Garlic and Ginger: In the same pan, add a bit more oil if necessary. Add minced garlic and ginger, sautéing for about 1 minute until fragrant.
6. Cook the Broccoli: Add the broccoli florets to the pan, stirring continuously for 3-4 minutes until they become bright green and tender-crisp.
7. Combine Ingredients: Return the beef to the pan and pour the marinade over the mixture. Stir everything together.
8. Thicken the Sauce: Allow the sauce to cook for about 2-3 minutes until it thickens and coats the beef and broccoli.
9. Season: Taste and season with salt and pepper as needed.
10. Serve: Once fully cooked, remove from heat and get ready to serve!