Beat the egg white with 15 ml/1 tbsp of corn-flour
and a pinch of salt. Add the sliced duck and mix
until the duck is coated.
Heat the oil and fry the
duck until cooked through and golden. Remove the
duck from the pan and drain off all but 30 ml/2 tbsp
of the oil.
Add the spring onions and pepper and
stir-fry for 3 minutes. Add the wine or sherry,
stock and sugar and bring to the boil.
Mix the
remaining corn-flour with a little water, stir it
into the sauce and simmer, stirring, until the sauce
thickens. Stir in the duck, heat through and serve.