1. Cut beef tenderloin into strips, add soy sauce, rice wine and black pepper to marinate for a while.
2. Wash the mushroom caps, cut into thick strips, blanch them for later use; wash the celery well and cut into sections.
3. Heat oil in a pan, add beef tenderloin and stir until cooked; then add mushrooms and celery, add oyster sauce and stir well.
4. Soy sauce and oyster sauce already have a certain salty taste. Taste it before serving. If the taste is not strong enough, add a little more salt.
Tips:The marinating time of beef tenderloin can be used to cut shiitake mushrooms and wash celery, so it can save a lot of time.
