1 1/2 cups ground almonds
1 Cup ground walnuts
1/2 Cup potato starch
1/4 Cup granulated sugar, plus 1 1/2 teaspoons for sprinkling on top
1/2 Cup confectioners' sugar, plus extra for dusting
To make the tart:
1 large egg white, beaten, for glazing
Directions
For the crust:
Step 1: In a large bowl with an electric mixer on high speed, beat 1/2 cup (1 stick) margarine until soft, scraping down the sides of the bowl with a silicone spatula once or twice.
Step 2: Add 1 1/2 cups ground almonds, 1 cup ground walnuts, 1/2 cup ground hazelnuts, 1/2 cup potato starch and 1/4 cup granulated sugar and mix. Separate a little more than half the dough and put it into your tart or pie pan. Leave the remaining dough in the bowl.