Chop the marzipan and beat it together with the egg, egg yolk, lemon zest, and ouzo. Then stir in the ground almonds.Tip: The mixture turns out best if you mix the ingredients in a food processor, making it smooth and easier to pipe. Fill the mixture into a piping bag fitted with a small star-shaped nozzle.
Preheat the oven to 160°C (320°F) (top/bottom heat).
Roll out the dough on a floured surface to about 5mm thick.
Cut out round cookies (about 3 cm in diameter) and place them on a baking sheet.
Use the piping bag to pipe a closed ring of small stars around the edge of each cookie.
Bake the cookies for 10-12 minutes, then let them cool completely.