For the crust:
3/4 cup gf flour
1/4 cup unsalted butter (cold and cut into chunks)
1/4 cup brown sugar, firmly packed
1/4 teaspoon baking powder
1/8 teaspoon cinnamon
1/8 teaspoon cardamom
1 egg yolk
For the filling:
1 cup
creme fraiche1 large egg
1/2 cup sugar
2 teaspoons cornstarch
zest of 1 lemon
2 pints of blueberries