Soak the gelatin. Bring the cream with mascarpone, sliced vanilla pod and sugar to the boil. Remove from heat and stir in the squeezed gelatine. I always add some cream to the gelatine first, stir and only then add the gelatine to the mass. Let the cream cool in a cold water bath. As soon as it starts to gel, pour into molds and refrigerate for at least 3 hours, or better overnight.
Wash and clean the strawberries. Put 6 strawberries aside. Bring the rest of the strawberries to the boil with lemon juice and powdered sugar, puree, allow to cool.
Melt the chopped couverture over a hot water bath. Use it to draw hearts on a plate. Dip the panna cotta briefly in hot water and turn it onto the plates. Serve with strawberry sauce and strawberry halves.