From The Diplomat’s burgers to Argo’s egg waffles, Hong Kong bars are raising the bar on food

The queue outside Bar Leone isn’t just for its acclaimed cocktails. More than a few guests are making a pilgrimage for Leone’s signature smoked olives – cheekily called “the world’s best olives (maybe)” – and its mortadella sandwich, with layers of thinly sliced mortadella, creamy whipped ricotta…