Rick Stein's Seafood Gratin | Flo's Food and Drink

Ingredients

• 450ml/16fl oz fish stock (see tip)
• 400g/14oz white fish fillets (such as cod), skinned and cut into 2cm/¾in pieces
• 200g/7oz scallops, removed from the shell and cleaned
• 400g/14oz raw prawns, peeled and deveined
• 50ml/2fl oz white wine
• 150ml/5fl oz full-fat milk
• 100ml/3½fl oz double cream
• 50g/1¾oz butter, plus extra for greasing
• 2 leeks, trimmed, halved lengthways and sliced
• 50g/1¾oz plain flour
• small handful fresh flatleaf parsley, roughly chopped
• 80g/2¾oz emmental cheese, grated
• 50g/1¾oz panko breadcrumbs
• salt and freshly ground black pepper
• crusty bread, cut into chunks, to serve