For the marinade, mix lemon juice, liqueur, 1 packet of vanilla sugar and sugar. Whip the cream, add the remaining vanillin sugar and vanilla pulp and beat until half stiff. Put the cream in a cool place. Wash the grapes thoroughly, drain, cut in half depending on size and remove the seeds. Seed melon with a tablespoon. Peel flesh and cut into slices. Wash peach, cut in half, remove stone.
Cut the flesh into slices. Wash and quarter pear and apple, cut out core. Cut the fruit into fine slices. Arrange fruit on 4 plates. Pour marinade evenly over the fruit. Serve with a dollop of cream and decorated with lemon and mint to taste