Pastel de nata is a traditional egg custard tart that is popular throughout the world. It is believed that for the best result, the filling should not be too sweet and should not have flavors of lemon nor vanilla. Instead, the tarts should be sprinkled with cinnamon and, ideally, paired with a cup of coffee.
Originally, this treat was made before the 18th century by Catholic monks and nuns in Santa Maria de Belém in Lisbon. The tart was made from leftover egg yolks that were used in the clearing of wines and starching of clothes. Later on, the clerics made a deal with a nearby bakery to start selling pastel de nata commercially, and the product was a huge success.