Prepare the ingredients by slicing the beef and broccoli.
Marinate the sliced beef with soy sauce, cornstarch, and a bit of water.
Heat vegetable oil in a large pan or wok over high heat.
Stir-fry the beef for 2-3 minutes until browned.
Add garlic and ginger, stirring for a few seconds until fragrant.
Incorporate the broccoli and stir-fry for another 3-4 minutes.
Pour in the beef broth and add oyster sauce.
Cook everything together for another 1-2 minutes until the sauce thickens.
Remove from heat and serve over rice or noodles.