Slice the beef tenderloin and marinate it with salt, black pepper, oyster sauce or cornstarch in water beforehand, then stir-fry it in a frying pan to keep it tender.

Finally, mix the other ingredients together to make a stir-fry, choose onions, green peppers, apricot mushrooms to go with the diced beef, and the black pepper flavor of the dish is very well matched, especially the apricot mushrooms, more to absorb the freshness of the beef and the richness of the black pepper sauce.