Pecan shortbread with chocolate

ingredients:
1/2 cup pecans
1 cup unbleached all purpose flour
1/3 cup brown sugar
2 tablespoons cornstarch
1/3 cup unsalted butter, softened
2 tablespoons hazelnut oil
35 half pecans
55 g semi-sweet chocolate, melted
method:

1. Place rack in center of oven. Preheat oven to 180 ° C (350 ° F). Line two baking sheets with parchment paper.
2. In a food processor, cut into fine powder pecans, flour, brown sugar and cornstarch. Add the butter, oil, rum and stir a few seconds at a time until the dough begins to form.
3. Remove the dough from the processor. A disk shape with your hands and wrap in plastic wrap. Refrigerate 30 minutes.
4. On a floured surface, roll out dough to a thickness of about 1 cm (1/2 in.). Y cut out biscuits with a rectangular cookie cutter about 2.5 X 3.5 cm (1 X 1 1/2 inches). Place a pecan half in the center of each cookie. Place cookies on baking sheet and bake in oven for about 20 minutes.
5. Cool completely.
6. To help of a fork, drop of melted chocolate drizzle over cookies. Chill until chocolate is frozen
http://www.ricardocuisine.com/recettes/2362-sables-aux-pacanes-et-au-chocolat