It may sound extravagant, but les treize desserts are actually simple to make, easy to customize. While this tradition may seem like a lofty one, les treize desserts are deceptively easy to prepare. The difficut part of assembling les treize desserts, then, isn't in their preparation, but merely in choosing which to include. says Rosa Jackson, founder of Nice's Les Petits Farçis cooking school and teacher of a course guiding people through the assembly of les treize desserts. Image zoom Photo by | Credit: pomplemousseA Contemporary SpinLocally, Les Treize Desserts is perceived by some to be an old-fashioned tradition, says Jackson.