Preheat a wok until it's very hot, without adding any oil.
Add the beef to the wok and season it with salt.
Introduce the onions to the hot wok and quickly flash-fry them.
Add the scallions to the wok, but do not fry them any further.
Pour in the hoisin sauce and a splash of wine, mixing everything together.
Allow the mixture to caramelize.
Add a dash of house sauce (Brown Chinese sauce) and stir well.
Serve the scallion beef hot.
