Use food proccessor to finely chop garlic, onion, ginger and fresh chillies. Add all ingredients to a large enamel or stainless steel pot (8 litres plus) and bring to the boil. Simmer for 2 hours with the lid on. When cool allow to stand over night. Next day stir the pot well and strain through a good strainer into another pot before transferring back into the vinegar containers. Make sure as much of the fine sediment as possible remains in the sauce. Shake well and transfer into smaller bottles as required. Hope you enjoy it. John Dickson. Perth Western Australia.