Step 1

In a bowl, combine oyster sauce, sesame oil, sherry, soy sauce, sugar, and cornstarch until sugar and cornstarch are dissolved.

Step 2

Place steak pieces in a large, shallow bowl. Pour over the oyster sauce mixture and coat steak pieces completely. Refrigerate to marinate for at least 30 minutes.

Step 3

Add vegetable oil in a large skillet or wok over medium-high heat. Add ginger and garlic and stir. Allow them to sizzle in the hot oil to flavor it, about 1 minute. Remove and discard ginger and garlic.

Step 4

Add the broccoli and stir until vibrant green and slightly tender, about 5 to 7 minutes. Take the broccoli out and set it aside.

Step 5

Add more oil into the wok if needed. Add the beef and marinade. Stir until the meat has browned, and the sauce is reduced into a glaze, about 5 minutes.

Step 6

Add the cooked broccoli. Stir meat and broccoli until heated through, about 3 minutes.