1 tbsp vegetable oil
1 large onion
, chopped
100g streaky bacon, chopped
1 tbsp plain flour
600ml fish stock, made from 1 fish stock cube
225g new potato
, halved
pinch mace
pinch cayenne pepper
300ml milk
320g pack fish pie mix (salmon, haddock and smoked haddock)
4 tbsp single cream
250g pack cooked mixed shellfish
small bunch parsley
, chopped
crusty bread, to serve