In mixing bowl, with a wooden spoon, cream the butter and sugar together. Add the yolks, 1 at a time, and mix thoroughly. Stir in the zest, pecans and flour. Add the vanilla and mix well. Form the dough into a log, 2 inches in diameter and 4 inches long. Cover with plastic wrap and refrigerate for 30 minutes.
Preheat the oven to 350 degrees F.
Remove from the refrigerator and cut into rounds, 1/4-inch thick. Place on a parchment lined baking sheet, 2 inches apart. Bake for about 10 minutes or until lightly browned on the edges. Bake in batches. Remove from the oven and cool on wire racks.
Makes 1 dozen.
To assemble, place galettes in the center of each plate. Spoon of the cream mixture over the cookie. Lay a second cookie on top of the cream. Repeat with the remaining cream and cookies. Drizzle the entire cookie with the Caramel sauce. Garnish with confectioners' sugar and the mint.
Yield: 4 servings