Heat fat, add vegetables, ginger, except spring onions.
Stir fry till cooked, add spring onions, stir.
Add stock, chilli sauce, soya sauce, vinegar and stir.
Bring to a boil, simmer for 7-8 minutes.Add salt and pepper.
Mix cornflour in 1/2 cup water, and pour into soup, stirring continuously.Cook for 2 minutes. Serve hot.