Ingredients
225g/8oz shortcrust pastry
100g/4oz leeks, outer leaves and tops removed
a pinch of saffron strands soaked in 1 tbsp warm water
15g/½oz unsalted butter
300ml/10fl oz fish stock
25ml/1fl oz Noilly Prat or other dry vermouth
a little lemon juice and salt
salt
a pinch of cayenne pepper...