Grease a springform pan (20 cm Ø) for the dough. Preheat the oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Wash lemon hot and dab dry. Finely grate the peel. Squeeze lemon.
Cream 125 g soft butter, cream cheese, lemon zest, vanilla pulp, sugar and 1 pinch of salt with the whisks of the mixer. Stir in the eggs one by one. Mix flour and baking powder. Stir 2 tablespoons lemon juice into the sugar-egg mixture.
Smooth the dough in the form. Bake in a hot oven for 45-50 minutes. Remove from the oven. Let it cool down.
Stir jelly with liqueur until smooth. Remove the cake from the mould. Cut through horizontally twice. Sprinkle 2 tablespoons of lemon juice on each base and cake top on the cut surface. Spread half of the jelly on the lower cake base.
Place the middle shelf on top. Spread with the rest of the jelly. Put the cake lid on top. Cover with foil. Weight the cake with a heavy board for about 4 hours.
Cut or cut out approx. 8 tartlets from the cake with a round high cutter (approx. 5 cm Ø; alternatively with a knife). Use cake remains for other purposes (e.g. for rum balls).
Sieve the icing sugar into a bowl and mix with 4 tablespoons of lemon juice to a thin glaze. If necessary, colour with red food colouring to a pale pink. Cover the tartlets with the icing. Leave to dry and mix with e.g.
candied flowers decorate.