and allow to cool.
2 Preheat the oven to
350°F/180°C. Make a flan
mixture by mixing the
cornstarch, flour, and
granulated sugar together
in a mixing bowl. Whisk in
the milk, crème fraîche,
egg yolk, and vanilla.
3 Arrange the poached
rhubarb evenly over the
bottom of the pre-baked