Halve and core the papaya. Set the seeds aside. Cut 4 thin wedges from the pulp. Dice the remaining pulp and puree with sugar and lime juice. Mix the quark with the papaya puree. Whip the cream until stiff, pull half of it into the quark mixture.
Divide the quark cream into 4 glasses, spread the rest of the cream on top. Scatter some seeds over it. Decorate with a papaya wedge and serve.