For the walnut lentils, first knead the dough ingredients into a smooth dough, wrap it in plastic wrap and refrigerate for 1 hour.
Roll out the dough thinly. Cut out lower part without, upper part with hole. This makes 2 trays. Bake them at 160 °C until light.
Spread cooled cookie bottoms with jam, sprinkle the tops with powdered sugar and place on the bottoms of the walnut linzer eyes.