03In a small saucepan, over low heat bring the cream to a boil. Add the chocolate to a small bowl and pour in the hot cream. Stir until smooth, then allow to cool slightly.04Pie:05Spread cooled pastry cream on the top of 3 of the cake layers. Put each disk of cake on top of each other, leaving the last cake disk untouched. Press the cake firmly. Put the cake on a wire rack with a sheet tray underneath. Pour the slightly cooled ganache on top of the cake being sure the ganache covers the whole cake. Allow to cool in the refrigerator or at room temperature. Put any remaining pastry cream in a piping bag with a star tip and use to decorate the top. Slice the cake and serve.