I can’t just ‘thumbs up’ this. It was GREAT! Thanks for sharing.
Noah Galuten, former Chowhound, did much the same in Los Angeles. His blog/site was called Man Bites World, but I can’t find it.
I think everything was chronicled on CH. Great read.
I’m getting inspired 
BTW, care to share his CH name. Although I was rarely on the LA board.
He is “Noahbites”: Chowhound (it looks like he posted there five months ago).
Even the Wayback Machine no longer has his site.
But, here’s a piece in SFGate, and at the bottom it has the list of countries he “visited” - though there’s also an annoying autoplay video, too:
https://www.sfgate.com/restaurants/article/Man-eats-his-way-around-the-world-in-L-A-3178478.php
If you search for Noah Galuten Man Bites World, you’ll find many other articles and such.
I remember that blog. It was fascinating.
In NYC there’s eattheworldnyc.com & eatingintranslation.com
Both are excellent blogs.
Vatican City cuisine?
Judging from a surviving Flickr photo, “Vatican City” included Roman artichoke lasagne.