Fish pie

Seafood
British
Fish
Pie
Breakfast
Baking
Fish pie
Floury Potatoes900g
Olive Oil2 tbsp
Semi-skimmed Milk600ml
White Fish Fillets800g
Plain flour1 tbsp
NutmegGrating
Double Cream3 tbsp
Jerusalem Artichokes200g
Leek1 finely sliced
Prawns200g peeled raw
ParsleyLarge handful
DillHandful
LemonGrated zest of 1
Gruyère25g grated
LemonJuice of 1