Roast salmon with spiced coconut crumbs

INGREDIENTS

• 50g butter
• 8 green cardamom pods , seeds removed and finely crushed
• 3 tbsp desiccated coconut
• 1 plump fresh red chilli , seeded and finely chopped
• 1 tbsp grated fresh root ginger
• 2 garlic cloves , finely chopped
• 1 tsp ground coriander
• generous pinch of ground turmeric
• 8 slim boneless skinless salmon fillets
• 2 tbsp finely chopped fresh coriander