Cut the cake into 10 slices and place them on a plate close together to form a rectangle of about 20 x 30 cm. Close baking frame or two pieces of aluminium foil folded several times (approx. 10 x 55 cm) tightly around the base. Heat up the jam and coat the base with it. Soak gelatine in plenty of cold water. Stir orange juice, lemon zest and juice, curd and sugar until smooth.
Squeeze the gelatine and dissolve over a mild heat. Remove 3-4 tablespoons of quark mixture and mix with the gelatine. Stir the mixed gelatine into the rest of the quark mixture. Chill briefly. Whip the cream until stiff. As soon as the cream starts to gel, fold in the cream. Spread the cream evenly on the base. Cover and chill for approx. 4 hours. Carefully loosen the baking frame or aluminium strips.
As soon as the cream starts to gel, fold in the cream. Spread the cream evenly on the base. Cover and chill for approx. 4 hours. Carefully loosen the baking frame or aluminium strips. Cut the cake into about 15 pieces. Decorate with orange slices, cherries and mint