Kumquat Tart Recipe

Name: Kumquat Tart Recipe
Ingredients: 5 tablespoons plus 1 teaspoon unsalted butter, softened; 1/4 cup plus 2 tablespoons confectioners' sugar; 1/2 vanilla bean; 1 large egg yolk; 1 1/4 cups (about 5 ounces) cake flour; Pinch salt; 2 cups fresh kumquats; 3/4 cup (about 5 ounces) sugar; 2 teaspoons cornstarch; 2 large eggs; 2 large egg yolks; 1/2 cup (8 tablespoons) butter, cut in 1/2 inch cubes; 2 tablespoons extra-virgin olive oil; 1/4 cup jam or marmalade