Avatar: The Last Airbender is rife with delicious-sounding foods that y'all have requested - puffin-seal sausages, fire flakes, sizzle crisps, smoked sea slug - but none sound quite so accomplishable as Aang's favorite food, egg custard tarts. Today we're taking a crack at both the show-accurate version, as well as its origin, the Portuguese pasteis de nata!