Place the steak in a bowl. Mix together the soy
sauce, wine or sherry and 30 ml/2 tbsp of corn-flour,
pour over the steak and stir well. Leave to marinate
for 30 minutes.
Heat the oil with the salt and
garlic and fry until the garlic is lightly browned.
Add the meat and marinade and stir-fry for 4
minutes.
Add the asparagus and stir-fry gently for 2
minutes. Add the stock and soy sauce, bring to the
boil and simmer, stirring for 3 minutes until the
meat is cooked.
Mix the remaining corn-flour with a
little more water or stock and stir it into the
sauce.
Simmer, stirring, for a few minutes until the
sauce clears and thickens.