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To make the pastry, sift the flour and salt into a
bowl. With a pastry blender or 2 knives, cut in the
butter and lard until the mixture resembles fine
breadcrumbs. Sprinkle with the lesser quantity of
iced water and mix until the dough holds together.
If the dough is too crumbly, add more water, 1
tablespoon at a time.
-
Gather the dough into a ball
and flatten into a round. Place in a sealed
polythene bag and chill for at least 30 minutes.
-
Place the porcini mushrooms in a small bowl. Add hot
water to cover and leave to soak for about 30
minutes, until soft. Lift out of the water with a
slotted spoon and drain on kitchen paper.
-
Preheat
the oven to 190°C/375°F/Gas mark 5.
-
Melt half of
the butter in a heavy-based saucepan. Whisk in the
flour and cook until bubbling, whisking constantly.
Add the hot stock and cook over a medium heat,
whisking, until the mixture boils. Cook for 2 to 3
minutes more,
then whisk in the cream. Season and set aside.
-
Heat the remaining butter in a large frying pan. Add
the onion and carrots and cook for about 5 minutes,
until softened. Add the celery and mushrooms and
cook for a further 5 minutes. Stir in the cooked
chicken, peas and drained porcini mushrooms.
-
Add the chicken
mixture to the cream sauce and stir to mix. Turn
into a 2.5 liter/4pt rectangular
baking dish.
-
Roll out the dough to about 4mm/1/8in
thickness. Cut into a rectangle about 2cm/3/4in
bigger than the dish. Layover the filling and seal
the edge by pressing down with your fingertips. Cut
several slits in the pastry to allow steam to escape
and brush the top of the pastry with the beaten egg.
Use any remaining pastry for decoration.
-
Bake for
about 30 minutes, until the pastry is browned. Serve
hot from the dish.