Sieve the flour
into a blender or food processor, add the ground
cinnamon, salt, butter and egg yolk. Process for
30 seconds or until evenly combined.
Add the
chilled water and process for a further 30
seconds. Knead together lightly and roll out to
a circle approximately 25.5cm/10in in diameter.
Put on a baking tray and chill for 10 to 15 minutes.
Preheat the oven to 200°C/400°F/Gas mark 6.
Prick the pastry all over with a fork. Bake for
20 to 25 minutes, or until golden brown.
Arrange the plums over the
cooked pastry and sprinkle with the sugar. Put
back in the oven for 40 to 45 minutes or until the plums are tender.
Melt the jam in a
small saucepan with the water, bring to the boil
and bubble for 1 minute. Brush or spoon over the warm tart.