If chocolate is your thing, La Maison du Chocolat in the Mall at Short Hills was the place to be Thursday afternoon. Gilles Marchal, the company's creative director and a mastery pastry chef-chocolaier, was on hand to demonstrate making a passion fruit chocolate ganache, which was served with a lemon pound cake. There also were tastings of other products from the company and a mousse Marchal had prepared prior to the event. La Maison du Chocolat has a seasonal store at the mall through the holidays.