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1
To make the crust, place the flour, sugar, salt, margarine, and butter in the bowl of a food processor fitted with a metal blade.
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2
Pulse 5 times.
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3
Add the egg yolk.
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4
With the motor running, add the water.
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5
Process until the dough sticks together, this will take only 5 to 6 seconds.
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6
Remove the dough from the bowl, cover with plastic wrap, and refrigerate for 30 minutes.
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7
To make the filling, place all the filling ingredients in a bowl, mix well, and set aside.
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8
Cut the dough in half.
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9
Roll one piece into a circle 1/4 inch thick and fit that into the bottom of a buttered 9-inch springform pan, curling the dough around the sides.
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10
Spread the apple filling evenly over the crust.
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11
Roll out the remaining dough to a 1/4-inch thickness and cover the apple mixture with it, tucking the sides of the dough into the pan with a thin spatula.
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12
Cut a few slits in the top crust.
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13
Bake for 35 to 40 minutes at 350 degrees or until the tart is golden brown.
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14
Let cool to room temperature before serving.
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15
Dust the tart with vanilla sugar and cut into wedges, and serve.
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16
*Vanilla Sugar - Open a box of confectioners' sugar into a plastic container.
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17
Take a fresh vanilla bean, split it lengthwise, scrape some of the seeds into the sugar and mix well.
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18
Place the slit vanilla bean in the plastic continaer and store for 3 or 4 days.
