Stir together the beef marinade ingredients (1 teaspoon soy sauce, 1 teaspoon Chinese rice wine, 1/2 teaspoon cornstarch, 1/8 teaspoon black pepper) in a medium bowl.
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Add the beef slices and stir until coated. Let stand for 10 minutes.
Step 4 of 14
Prepare the sauce:
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Stir together the sauce ingredients (2 tablespoons oyster sauce, 1 teaspoon Chinese rice wine, 1 teaspoon soy sauce, 1/4 cup chicken broth) in a small bowl. Set aside.
Step 6 of 14
Blanch or steam the broccoli:
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Bring a pot of water to a boil. Add the broccoli and cook until crisp-tender, about 2 minutes. Drain thoroughly.
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Stir-fry the beef:
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Heat a large frying pan or wok over high heat until a bead of water sizzles and instantly evaporates upon contact. Add the cooking oil and swirl to coat.
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Add the beef and immediately spread it out all over the surface of the wok or pan in a single layer (preferably not touching).
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Let the beef fry undisturbed for 1 minute. Flip the beef slices over, add the garlic to the pan, and fry for an additional 30 seconds to 1 minute until no longer pink.
Step 12 of 14
Add the sauce, cornstarch, and broccoli:
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Pour in the sauce and the cornstarch slurry (1 teaspoon cornstarch dissolved in 1 tablespoon of water). Stir until the sauce boils and thickens, about 30 seconds. Stir in the broccoli.
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Serve immediately, with steamed rice or on its own.