It depends on where I am. I recently discovered that my Busan comfort food is “Hotteok with seeds.” In Central Asia, it’s tandoor bread — by whatever name it’s called in the local tongue. In Tblisi, it’s khinkali. In Peru, a lomo saltado is a beautiful thing. Chicago is the only place I’ll eat a hotdog, but I do love one there.
As a traveler, I find it’s important to not get attached to any one thing. If you crave a bagel, you’re great if you’re in New York or Tel Aviv, but if you insist on one in Hyderabad, it will be a sad experience. But, by the same token, if you order Chicken Biryani in Des Moines, expect to be underwhelmed (or — if not — to pay an exorbitant amount, either way it’s depressing.)
Probably the single most widespread comfort food would be whatever the local dumpling is, be it called mo-mo, khinkali, pierogi, dim sum, etc. All quite unique, but with an underlying familiarity.
So, in the immortal words of (the apparently quite slutty) Crosby, Stills, Nash, and Young, “If you can’t be with the one you love… love the one you’re with.”
Tiger Riding for Beginners 