In a pot of boiling water, boil the fish for 15 mins. Then separate the flesh from the bones.
Set up a wok and fry the grated coconut without any oil on medium heat until it is close to golden brown.
In a pestle and mortar, pound the lemongrass, shallots, ginger and black pepper until fine, then add in the wok.
Next, pound the fish flesh and add it in the wok.
Season with salt and sugar and mix well