3-4 medium leeks, roughly sliced
a couple of handfuls of new potatoes, cut into bite-sized chunks
a good handful fresh flatleaf parsley, roughly chopped
1 corn on the cob
1 small handful tender fresh thyme sprigs
2-3 fresh bay leaves
a sprinkling of black peppercorns
1 good slice butter
milk, enough to cover the fish
a couple of undyed smoked haddock fillets