1. Thaw the steak and cut into strips.
2. Add cooking wine, ground black pepper, and starch.
3. Scratch well and marinate for 10 to 20 minutes, then add a little bit of cooking oil and stir well.
4. Mix two spoons of black pepper juice with half a bowl of water, add light soy sauce and dark soy sauce, a little salt, sugar, oyster sauce, etc., mix well and set aside.
5. Wash the green onions and cut into small pieces for later use.
6. Pour an appropriate amount of cooking oil into the pot and heat it up.
7. Add scallions and sauté fragrant.
8. Add the beef tenderloin and stir fry a few times.
9. Pour the prepared black pepper sauce into the pot.
10. Stir fry over high heat to collect the juice.
11. Just put it out of the pot and serve it on the plate.
