Cut the beef into small thin slices and rub these with the salt and
1/2 tablespoon of oil. Mix the soy sauce, cornstarch, water, sherry
and stock in a bowl until well blended. Finely chop the ginger. Heat
the oil in a frying pan. When hot add the beef, spreading the pieces
out, and stir-fry them over a high heat for 1 minute. Add the ginger,
followed by the oyster sauce and sugar, and continue to stir-fry for
30 seconds. Pour in the sauce mixture from the bowl, and continue to
stir-fry over a high heat for a further minute. Serve immediately on
a well-heated dish.
This mixture of seafood flavor with meat is a common Cantonese
practice which most southerners enjoy, but which is not always
accepted in central and north China.