Haddock fillet with leek and spinach stuffing recipe

Ingredients

• haddock fillets, skinned
• g/1oz butter
• Lemon
• Filling
• leeks, trimmed, washed and shredded
• g/7oz baby spinach leaves
• g/3oz goat';s cheese
• g/3oz fresh white breadcrumbs
• freshly grated nutmeg
• Sea salt and ground black pepper