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Preheat the oven to 350°F/180°C.
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Roll out the dough
and line a greased 10 1/3 inch (26 cm) tart pan with it.
Cover with a piece of baking paper and weigh down with
dried beans. Bake blind for 10 min.
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Place
the zest of 4
oranges in a saucepan. Cover with water and bring it to
a boil. Drain. Put the blanched zest back into the
saucepan. Add 2 cups (50 cl) of water and 7 1/4
oz (200g) of sugar. Cook
over low heat for 30 min to turn the mixture into jam.
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During this
time
squeeze the oranges. Reserve the juice, eggs and the
yolks together. Add the remaining sugar and whisk
together. Bring the milk to a boil with the remaining butter, cut into
chunks. Mix the starch together with orange juice.
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Pour this mixture into the saucepan, add the egg-sugar
mixture and then the boiling
milk
and the crème fraiche and cook over low heat for 2 min.
Set aside for about 30 min.
-
Pour the orange batter
combined with 2/3 of the orange zest jam over the pastry
crust. Arrange the remaining orange zest jam on the
surface of the tart.