Sweet and Sour Sauce, my mom's recipe

You will need:

3/4 cup water pr chicken stock
1/2 cup soft brown sugar
1/2 cup malt vinigar
1 table spoon of Corn flour
1 table spoon of Soy sauce
1/4 cup of cold water
2 table spoons of sherry or port
Method:

Bring water or stock to the boil, add sugar and stir to disolve, then cook for a minute
Add vinigar and cook for a minute
add soy sauce
blend cornflour in a mug with some of the cold water
add slowly and  stir to thicken
add the sherry / port.

This one you need to taste to get the balance right but lovely over chicken stir fry or port stir fry.