2.5kg/5lb 8oz floury potatoes such as Maris Piper or King Edward, peeled and cut into chunks
1 onion, thickly sliced
large handful flatleaf parsley, chopped
90²µ/3¼´Ç³ú plain flour
1 fresh bay leaf
4 cloves
freshly grated nutmeg
salt and freshly ground white pepper
100²µ/3½´Ç³ú butter
600ml/21fl oz double cream
8 free-range eggs
2 free-range egg yolks
900ml/1½ pints whole milk
200–300ml/7–10fl oz whole milk
900g/2lb unskinned pollock fillet
24 large cooked prawns
450g/1lb undyed smoked haddock fillet