lemon sauce recipe please?

i am looking for a lemon sauce recipe to go with chinese food. anyone help?
i guess stir fry consistency kind of thing....ish...??

http://www.cooks.com/rec/doc/0,1639,...226198,00.html

Ignore the dead flesh bit of the recipe, the sauce bit looks ok, obviously using marge or oil instead of butter.

Not tried it myself but that's sort of how I would make it, although it seems a lot of cornflour for the amount of liquid - I suppose it depends how thick you want it.