For the pastry,
sift the flour and salt into a bowl. Add the sugar
and butter. Rub in until the mixture resembles
coarse bread crumbs. Stir in the egg yolk and lemon
juice. Form a ball, wrap, and chill for 20 minutes.
Preheat
the oven to 200'C/ 400'F /Gas 6. Roll out
the pastry and use to line a 25cm/10in tart
dish.
Sprinkle the pastry case
with the grated chocolate.
Peel, halve and
core the pears. Cut in thin slices crossways, then
fan out slightly. Transfer the pears to the tart
using a palette knife and arrange like wheel spokes.
Whisk together
the egg and egg yolk, cream and vanilla. Ladle over
the pears and sprinkle with sugar.
Bake on a baking
sheet for 10 minutes. Reduce the heat to
180'C/350'F/Gas 4 and cook until the custard is set
and the pears begin to caramelize, about 20 minutes
more. Serve while still warm.