BBC Food - Recipes - Cod with mango and curry

Ingredients

• 1 tbsp brown sugar
• 4 tbsp chardonnay vinegar
• 1 small red onion , finely sliced
• 1 firm mango , peeled, roughly chopped, stone discarded
• 1 tbsp grated ginger
• 1 small red chilli , halved, seeds removed, julienned
• 4 x 150g/5½oz cod loin, skin on, pin boned
• sea salt
• freshly ground black pepper
• 1 tsp mild curry powder
• 20g/¾oz butter
• 1 tbsp olive oil
• 60ml/2fl oz fish stock
• 60ml/2fl oz coconut milk
• 100ml/3½fl oz whipping cream , lightly whipped, plus 2 tbsp cream
• 1 tbsp chopped chervil
• 1 tsp lemon juice
• 1 baby gem lettuce , cut in four
• ½ cucumber , peeled, seeds removed, in large julienne