The Bumpy Gourd That’s Winning Over Bartenders

Austin Hennelly, the 35-year-old bar director at Kato, a Taiwanese restaurant in Los Angeles, likens tasting bitter melon to “going down the drop of a roller coaster.” Sipping the fruit’s juice — which is the star ingredient in his Garden Tonic, a mocktail he considers the best drink on Kato’s menu — is, he says, “a little bit unpleasant and maybe a little bit scary, but it’s exhilarating, and then you just want…