Peel and slice potatoes

Boil potatoes till soft

Drain water, add butter and milk and mash

Cook fish in oven wrapped in foil for half an hour, slice into small pieces and remove the bones

Add boiling water to parsley sauce

Pour fish into an oven proof dish with parsley sauce and spoon the mash over fish evenly to cover the dish and put it in oven for 15/20mins at 180*C