Instructions:

1. To make the "Linzer" cookies, pour the flour into a bowl, add the butter, and crumble it together. Add the egg yolk, powdered sugar, and grated lemon zest, then knead the dough quickly until combined. Shape it into a ball, wrap it in plastic wrap, and chill in the fridge for at least 1 hour.

2. Roll out the dough on a floured surface to be 0,5 cm (0,2 inches) thick, and cut out different shapes. Use a smaller cutter to punch a hole in the center of half the shapes.

3. Place the cookies on a baking sheet lined with parchment paper, and brush the ones with holes with beaten egg. Bake in a preheated oven at 170°C (340°F) for 20–25 minutes, until golden brown.

4. After cooling, fill the cookies with strawberry jam and drizzle with melted chocolate.