Dead simple concept, infinite variations, and yet nobody's managed to improve on a good street one.
Fun fact: Tacos al pastor were invented by Lebanese immigrants who adapted shawarma for Mexican street stalls.
Watching the bloke shave meat off that spinning cone is weirdly one of life's great pleasures.
Fun fact: Shawarma, Greek gyros, and Turkish döner all descend from the same Ottoman vertical-spit technique.