Prepare the shortcrust pastry for the Linzer tarts: chop the hazelnuts very finely together with white sugar and put them into a bowl.
Add brown sugar, the flour, the pinch of salt, the cinnamon, the cloves and the grated lemon peel: mix.
Now add the very cold butter and the hard-boiled egg yolks and start working the dough in the bowl: as soon as it starts to compact, transfer it to the pastry board and finish the preparation.
Form a ball, wrap it in plastic and put it in the refrigerator for 2 hours.
After the resting time, line 6 tartlet molds of 10 cm in diameter.
Fill them with two tablespoons of jam and decorate with rolls of dough: the idea is to form an irregular grid, as if the rolls were mummy bandages.
Decorate the outline of your Linzer Tarts with flaked almonds and put back in the refrigerator for 1 hour.
Turn on the oven at 170 °C in fan mode and cook the tartlets for about 20 minutes.
Let them cool completely and, in the meantime, prepare the eyes: melt the dark chocolate in the microwave and use it to draw a dot in the center of the chocolate-covered hazelnuts.
Decorate the linzer tarts with the little eyes and enjoy them!