Good Sweet and Sour Sauce

My boys like fish or chicken with sweet and sour. This is a very good recipe for a simple sauce that tastes very good.

1/3 cup Rice Vinegar
4 tbsp brown sugar
1 tbspn ketchup
1 tbspn good soy
2 tspn cornstarch
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1 chopped onion, 1 chopped green pepper, half a cup of tinned or fresh pineapple and a piece of ginger about 1 inch finely chopped.

Boil the wet ingredients until mixed and sugar dissolved  and then add the choice of veg/fruit and simmer for 20 minutes. Finally add the cornflour mixed in  a little water to thicken. Serve with fried fish, chicken, or pork and rice.