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1
Whisk together the egg yolk, heavy cream and vanilla extract in a small bowl. Set aside.
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2
Using a food processor, place the all-purpose flour, confectioner's sugar, lavender and salt into the bowl. Process briefly to combine. Scatter the butter pieces over the flour mixture and pulse until the mixture resembles coarse meal.
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3
With the food processor running, add the egg mixture and process until the dough just comes together.
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4
Remove the dough from the food processor and wrap into a sheet of plastic to form a 6-inch disk. Wrap in plastic and refrigerate for an hour.
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5
Remove from fridge and lightly dust the tart dough with flour before rolling into a rectangle.
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6
Transfer the dough to a rectangle tart pan by rolling it loosely around the rolling pin and unrolling over the tart pan. Press the dough into the fluted edges and the corners of the pan. Freeze the tart lined pan for 30 minutes.
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7
Place the tart pan on a baking sheet. Press a 12-inch square of aluminum foil into the tart shell and fill with ceramic pie weights (or beans). Bake at 375F for 30 minutes, making sure to turn 180 degrees after 15 minutes.
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8
Remove the foil and weights after 30 minutes and continue to bake for another 5 to 8 minutes until the tart is a deep golden brown. Cool on a wire rack.
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9
Pour the orange juice into a small sauce pan and place over medium-high heat. After bringing the juice to a rapid simmer, let it reduce down to 1/2 cup.
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10
Transfer the orange juice to a small bowl. Stir in the zest and lemon juice. Allow to cool.
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11
In a separate bowl, whisk together the egg, yolks, and sugar. Once the orange juice mixture has cooled to room temperature, whisk it into the egg mixture in a steady stream.
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12
Pour the egg and juice mixture back into the small sauce pan. Over medium heat, stir the mixture slowly and constantly until the mixture has thickened. It should take 6-8 minutes for the mixture to reach a pudding-like consistency or reach a temperature of 180u00b0F.
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13
Place a clean bowl with a strainer over the top. Pour the orange pudding into the bowl to remove the zest. Then stir in the butter and the pinch of salt while the curd is still warm.
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14
Pour the orange curd mixture into the pre-baked tart shell. Sprinkle some lavender into the top of the tart pan and refrigerate for at least 6 hours until the curd is firm.
