Marinate the beef slices with light soy sauce, Shaoxing wine, sugar, white pepper, cornstarch, and cooking oil for at least 15 minutes.
Blanch asparagus in boiling water for 1-2 minutes until bright green and slightly tender-crisp. Drain and set aside.
In a small bowl, combine black pepper sauce, oyster sauce, sugar, and water/beef broth. Mix well and set aside.
Heat cooking oil in a wok or large pan over high heat until smoking. Add marinated beef and stir-fry quickly for 1-2 minutes until browned but still slightly pink in the center. Remove beef from wok and set aside.
Add minced garlic and ginger slices to the same wok (add a little more oil if needed). Stir-fry for 30 seconds until fragrant.
Add the blanched asparagus and stir-fry for 1 minute.
Pour in the prepared black pepper sauce mixture. Bring to a simmer, then return the beef slices to the wok. Toss everything together quickly until the sauce thickens and coats all ingredients.
Serve immediately with white rice.
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