Preparation Preheat oven to 450°F. Line large baking sheet with parchment. Roll out dough on lightly floured surface to 11-inch round. Transfer dough to prepared sheet. Make indentations all over dough with fingertips. Brush melted butter over. Bake until pale golden, about 20 minutes. Smooth chocolate-hazelnut spread over hot crust. Sprinkle chopped bittersweet chocolate and white chocolate over. Bake until chocolate begins to melt, about 2 minutes. Sprinkle chopped hazelnuts over, cut into wedges, and serve.
Preparation Preheat oven to 450°F. Line large baking sheet with parchment. Roll out dough on lightly floured surface to 11-inch round. Transfer dough to prepared sheet. Make indentations all over dough with fingertips. Brush melted butter over. Bake until pale golden, about 20 minutes. Smooth chocolate-hazelnut spread over hot crust. Sprinkle chopped bittersweet chocolate and white chocolate over. Bake until chocolate begins to melt, about 2 minutes. Sprinkle chopped hazelnuts over, cut into wedges, and serve.