Step 1

Combine flours, 1/4 cup powdered sugar and salt in large bowl. Stir in butter with clean fingers or a fork until the mixture resembles small pebbles. Mix in egg yolk and almond extract. Add enough ice water to form dough. Wrap dough in plastic wrap and refrigerate at least 1 hour.

Step 2

Grease 9-inch tart pan. Roll out chilled dough to 1/4-inch thickness. Press into prepared pan. Prick bottom of crust with fork. Refrigerate at least 30 minutes.

Step 3

Preheat oven to 400°F. Cover crust with parchment paper. Add dry beans or pie weights in center. Bake in preheated oven 15 minutes. Remove weights. Bake 3 to 5 minutes until crust is golden. Cool completely.

Step 4

Mix mascarpone, 1/4 cup powdered sugar and vanilla extract in large bowl. Whip cream in separate bowl until just thickened. Fold cream into cheese mixture. Pour filling into cooled crust. Sprinkle with chopped almonds, sunflower seeds and a dusting of powdered sugar. Chill for at least 1 hour before serving.