Spicy fish (Ikan Panggang)

Had a small bbq yesterday with some spicy mackerals. They are very easy to make and tasty. To bbq best use a bbq fish holder to prevent the fish breaking into pieces. If you don't fancy a bbq, the fish can be grilled.To make a rempah or spice paste:3 - 4 shallots (about 100g), peeled2 fat clove of garlic, peeled1 small piece of galangal, peeled1 stalk of lemongrass, use only the middle less woody