Melt the dark chocolate and spread 3 plates about 2 mm thick on a piece of baking paper the size of a baking pan, then put in a cool place.
Meanwhile, beat the egg yolks and sugar until frothy. Whip the cream separately and fold in until stiff. A pinch of cinnamon, the pulp of the vanilla pod and, if you like, add the lemon aroma.
Pour the cream 2 cm high into a silicone baking mold, alternately place the chocolate plates in between. Spread the chocolate sprinkles on top. Place in the freezer for at least 5 hours.
For the low carb version, replace sugar with 200 g Xucker light.