Khachapuri, a gooey, addictive, cheese-stuffed flatbread, is ubiquitous in Georgia, the Caucasian country that shares borders with Armenia, Azerbaijan, Russia and Turkey. Except for when there’s a funeral. “If you’re in a bad mood or sad, when you’re grieving the death of a loved one or have a broken heart, you should never even touch dough; just stay away from it,” said my friend Mako Kavtaradze, a born-and-bred resident of the capital, Tbilisi, and executive director of Georgian spice company Spy Recipe. “If you’re not in a happy mood, we will be able to tell when we taste the khachapuri...