Prepare the raspberry compote and juice by adding raspberries, sugar, lime zest, and juice into a bowl. Cover the bowl and place it in a bain-marie for 1 hour.
Strain the mixture and let the juice cool. Optionally, add a splash of Kirsch.
Blend the remaining raspberry pulp and cover it with plastic wrap. Set it aside.
For the cream layer, whip the cold cream and mascarpone together in a stand mixer, starting on low speed and increasing to medium until soft but not too firm.
Slowly incorporate the condensed milk into the whipped cream mixture. Mix on low speed until combined.
To assemble the dessert, dip the ladyfinger biscuits in the raspberry juice and lay them on the bottom of a 32 cm cake mold lined with plastic wrap or parchment paper.
Pipe half of the cream over the biscuits.
Add another layer of soaked biscuits and gently press them down.
Pipe the remaining cream on top. Tap the mold to pack the cream, smooth the top with a spatula, cover with plastic wrap, and freeze for 6 hours.
Unmold the dessert and sprinkle freeze-dried raspberry powder on top.
Let the dessert sit for 15 minutes at room temperature before serving.
Optionally, serve the dessert with the raspberry compote on the side.