Walnut Vanilla Bean Marzipan

From Anne's Food

120 g almonds 50 g walnuts 120 g powdered sugar 1/2 egg white 1 tbsp white baking syrup (or corn syrup) 1 vanilla bean Grind almonds and walnuts in an almond grinder. Combine with the powdered sugar and egg white, and add the syrup. If the mixture seems too wet, you can add more sugar. If it's too dry, add more syrup. Finally, mix in the scraped out innards of the vanilla bean.