Head for the 13th arrondissement of Paris to discover Ngoc Xuyen Saigon, a veritable temple to traditional Vietnamese cuisine, with a focus on pho and noodle soups. This long-sided restaurant, recognizable by its pink façade, is an institution for connoisseurs in search of authenticity. Open daily from 9.30am to 5pm, the menu is short but varied, with dishes depending on the day of the week.