Beef fillet with ginger

Cut the meat into thin strips, put it in a bowl together with soy sauce, miso, sugar, ginger and finely chopped onion (if you don't have miso,

you can only use soy sauce and adjust the amount). Mix well and leave to marinate for about ten minutes. In a pan, heat the oil well. Once at temperature, cook the meat together with the marinade for a couple of minutes, mixing carefully. Serve hot.