Watch on Soap2day. In this fifth episode of the series, La torta di Guglielmo, Rossini, is “interviewed” by Gaia de Bernardis, presenting, this time, the cake that gives the clip its title: an apple pie, with cream, sugar, flour and butter. Together with the composer, musicologist Alberto Simoncini and the ever-present Stendhal. Of course, it follows from the title that the opera presented along with the dessert is William Tell, whose libretto was taken from the play of the same name (1804) by Friedrich Schiller, later elaborated by Victor-Joseph-Étienne de Jouy and Hippolyte-Louis-Florent Bis. Its first performance took place at the Paris Opéra on August 3, 1829.