James Martin's fisherman's pie recipe

Ingredients

• 450 g haddock, skin removed
• 450 g cod, skin removed
• 12 scallops
• 24 prawns, peeled and deveined
• 2 Arbroath smokies (optional)
• 500 ml full-fat milk
• 2 bay leaves
• 1/2 onion, studded with 4 cloves
• 40 g butter
• 2 1/2 tbsp plain flour
• 1 small bunch of parsley, chopped
• 800 g mashed potato
• 50 g butter, melted
• 100 ml double cream
• 600 g frozen peas
• 1 knob of butter