Add 300 ml/1/2
pt/2/3 cup hot water to the grated
coconut and extract a thick milk. Add
the remaining hot water to the coconut
and strain to extract the second milk.
Heat the oil and
fry the onions, garlic and ginger for 2
minutes. Add the chilies, flour and
turmeric, stirring well to avoid lumps.
Add the tomatoes and thin coconut milk,
bring to the boil then simmer for 10
minutes.
Add the fish and
white wine vinegar and simmer for 15
minutes. Add the thick coconut milk and
salt and simmer for 5 minutes. Serve hot
with plain rice or idlis.