Blueberry-Almond Frangipane Tart

For the crust: 1 package dry mix sugar cookie dough + the ingredients needed to make it, according to the package For the frangipane: 8 tbsn. unsalted butter, softened 2/3 cup powdered sugar 1 cup almond meal or ground almonds 4 tsp. cornstarch 1 large egg 1 large egg yolk 1 tsp. almond extract 3 cups fresh blueberries, 1 cup set aside 1/2 cup slivered almonds First, prepare the frangipane filing. Combine the butter and sugar in a food processor and pulse until smooth. Add the ground almonds and pulse to blend. Add the cornstarch and pulse. Mix in the egg, egg yolk and almond extract. Scrape into a bowl and chill in the refrigerator for at least 2 hours before using. Before spreading into the tart crust, make sure to bring back to room temperature. Preheat the oven to 350 F. Prepare the sugar cookie mix according to the directions on the package. Divide the dough among two 9" tart pans with removable bottoms. Spread evenly along the entire surface and up the sides (don't worry if it looks thin - it will puff up during baking). Divide the frangipane among the two tarts and spread evenly on top of the sugar cookie base. Sprinkle each tart with 1 cup of fresh blueberries each, pressing slightly so that they are semi-submerged into the frangipane. Sprinkle the edges of the tart with the slivered almonds. Bake for 15 - 20 minutes until the edges are just barely golden and puffed up, while the blueberries have released some of their juices. Set aside to cool a bit. Sprinkle the remaining fresh berries on top of each tart. You can glaze the tart with some melted preserves if you wish or dress it up with some powdered sugar, but I thought it was perfectly beautiful as is. Source: http://une-deuxsenses.blogspot.gr/