Prepare the Beef:
Thinly slice the beef against the grain into bite-sized strips. Season lightly with salt and pepper.
Make the Sauce:
In a small bowl, whisk together the soy sauce, oyster sauce, brown sugar, cornstarch, and water. Set aside.
Cook the Broccoli:
In a large skillet or wok, heat 1 tablespoon of vegetable oil over medium-high heat. Add the broccoli florets and sauté for 3-4 minutes until they are bright green and slightly tender. If using frozen broccoli, cook for a bit longer. Remove the broccoli from the skillet and set it aside.
Cook the Beef:
In the same skillet, add the remaining tablespoon of vegetable oil. Once the oil is hot, add the sliced beef and cook for 2-3 minutes, stirring occasionally, until it’s browned and just cooked through. Add the garlic and ginger, and sauté for another 1 minute until fragrant.
Combine the Ingredients:
Return the cooked broccoli to the skillet with the beef. Stir in the sauce mixture and cook for another 2-3 minutes until the sauce thickens and coats the beef and broccoli evenly.
Serve:
Serve the beef and broccoli hot over steamed rice.