Howth Head Seafood Chowder: Donal Skehan

Name: Howth Head Seafood Chowder: Donal Skehan
Ingredients: 1 tblsp unsalted butter; 1 onion, peeled and finely chopped; 50g pancetta, cut into cubes; 2 thyme sprigs, leaves picked; 1 bay leaf; 300g potatoes, peeled and chopped; 1 litre fish stock; Sea salt and ground black pepper; 150g cod or haddock, skinned and flesh cut into 2cm pieces; 150g salmon, skinned and flesh cut into 2cm pieces; 250g undyed smoked haddock, skinned and flesh cut into 2cm pieces; 1kg mussels in their shells, cleaned; 1 tblsp finely chopped flat-leaf parsley; 160ml double cream; 0 Smoked salmon, cut into strips, to garnish