Sort the raspberries and put 15 pieces aside. Wash the lemon and grate dry. Grate the peel thinly and squeeze the lemon. Mix mascarpone, ricotta, lemon juice and zest, vanillin sugar and sugar. Whip the cream until stiff. Mix coffee and liqueur. Spread half of the lady fingers in the mould (22 x 22 cm) and sprinkle with approx. 150 ml coffee.
Fold cream into the Marscarpone mixture. Finally, carefully fold in the remaining raspberries and spread half on the sponge cake. Spread the remaining lady fingers on the cream and sprinkle with the remaining coffee. Finish with the rest of the cream and leave to soak for 4-5 hours. Peel off fine shavings from the chocolate with a peeler, spread on the tiramisu and dust with cocoa. Decorate the tiramisu with a raspberry heart