-
To make the pastry, first sift the flour and salt.
Blend together the butter and egg yolks in a blender
or food processor until creamy. Add the flour and
process until the mixture is just coming together.
Add about 1 tablespoon cold water and process for a
few seconds more. Turn out on to a lightly floured
surface and knead lightly. Wrap in Clingfilm and
chill for about 1 hour.
-
Poach the chicken breasts
with the onion in a large saucepan of boiling water
until the chicken is tender. Leave to cool in the
liquid.
-
Preheat the oven to 200°C/400°F/Gas mark
6.
-
Divide the pastry into 2 pieces, one slightly
larger than the other. Roll out the larger piece on
a lightly floured surface and use to line a 18 x
28cm/7 x 11in baking dish. Prick the base with a fork
and bake for 15 minutes. Leave to cool.
-
Lift the
cooled chicken from the poaching liquid and discard
any skin and bones. Cut the chicken flesh into
strips, then set aside.
-
Melt the butter in a frying pan and
fry the leeks over a low heat,
stirring occasionally, until soft. Stir in the
Cheddar, Parmesan and parsley. Spread half the leek
mixture over the cooked pastry base, leaving a
border all the way around.
-
Cover the leek mixture
with the chicken strips, then top with the remaining
leek mixture.
Mix together the mustard,
corn flour and cream in a
small bowl. Add seasoning to taste. Pour over the
filling.
-
Moisten the
edges of the cooked pastry base. Roll out the
remaining pastry and use to cover the pie. Brush
with beaten egg and bake for 30 to 40 minutes until
golden and crisp. Serve hot.