Roughly chop the chocolate. Melt carefully in a hot water bath. Beat the egg with the sugar in a hot water bath until the mixture becomes thick. Stir in the chocolate. Let the mixture cool down.
Line the bottom of a baking dish (20 x 20 cm) with the ladyfingers. Soak the biscuits with the rumtop liquid. Spread the fruits on top. Whip the cream until stiff and carefully fold it into the chocolate mixture. Spread on the fruits and refrigerate overnight.