Pasteis de Nata, also known as Portuguese custard tarts, are a beloved sweet treat in Portugal. These delicious pastries consist of a flaky pastry shell filled with a creamy custard made from eggs, sugar, milk, and vanilla. The tarts are then baked until the custard is set and the pastry is golden brown. Pasteis de Nata are best enjoyed warm, with a sprinkle of cinnamon or powdered sugar on top. They are a must-try dessert for anyone visiting Portugal.