Barbecued whole fish

Ingredients

• 1 red onion, finely diced
• 2 clove garlic, finely chopped
• 2.5 centimetre piece of ginger
• 1 tablespoon chopped lemongrass
• 1 tablespoon sambal oelek (chilli paste)
• 1 tablespoon tamarind paste
• 1/4 cup mint leaves, chopped
• 1/4 cup (20g) desiccated coconut
• 1/2 cup (125ml) coconut milk
• 2 tablespoon oil
• 1 large whole snapper (about 3kg), gutted and cleaned
• 1 red birdseye chilli, sliced
• lemon halves, grilled, to serve