In a bowl, combine beef sirloin, soy sauce, cornstarch, sesame oil, white pepper, and 1 tbsp cooking oil. Mix well and let it marinate for at least 15 minutes.
In a small bowl, combine oyster sauce, sugar, and water or chicken broth. Mix well and set aside.
Heat 1 tbsp cooking oil in a wok or large frying pan over high heat. Add red bell pepper and green bell pepper. Stir-fry for 2-3 minutes until slightly tender-crisp. Remove from wok and set aside.
Add the remaining 1 tbsp cooking oil to the wok. Add the marinated beef sirloin and stir-fry quickly until it is about 80% cooked and browned, about 1-2 minutes. Remove from wok and set aside.
Add minced garlic and fermented black beans to the wok. Stir-fry for 30 seconds until fragrant. Return the bell peppers and beef to the wok. Pour in the prepared sauce. Stir-fry everything together for another 1-2 minutes until the sauce thickens and coats the ingredients. Serve hot with rice.
Cook this in the app — save it & get tonight’s menu
Get the app