In an appropriately sized large pan, slowly fry your onion and leek
with around 5 tablespoons of olive oil for 5 minutes until soft and
tender. With a teaspoon, remove and discard the fluffy tasteless core
from the courgettes and grate the rest into the pan. Chop the potatoes
into rough 2cm/1 inch dice and add to the pan. Give everything a good
stir and then add the anchovies. Turn the heat up and add the white
wine. Allow to cook down by half before adding your milk and stock.
Bring to the boil and simmer for half an hour until the potatoes are
tender. At this point add your cod and simmer for a further 15 minutes
until the flesh flakes away ? feel free to stir and break up the fish,
but it's quite nice to leave some big chunks as well. Season carefully
to taste. Divide between your bowls, and serve with a small handful of
parsley and spring onion dressed with a little olive oil and lemon
juice.
Try this: Sprinkle a little orange zest over the parsley and spring onion. It really works with the cod.