You can find Italian restaurants all over the world. Where are all the Portugese restaurants if this cuisine is so brilliant?
It can be hard to know what to eat and often more importantly where to eat as a tourist, and in Portugal its often (in my experience) the last obvious establishments that are the best (often places you don't even think sell food).
Doubt there is one (some might say apple pie) and the only thing I can think of that unites all the different American cuisines and regional variations is the sandwich.
https://www.nytimes.com/interactive/2015/04/14/dining/field-...
Big Mac?
Spain/Portuguese food isn't snobbish or fancy, but it's generally good. As a matter of fact I find that the baseline for what is bad in these places is actually quite high.
That is not the case for your average Italian restaurant around the world. Most of them are not that great.
The best National food after Italian (and maybe Japanese) is Georgian, but you don't see their restaurants worldwide either.
Georgia being a tiny third world country that hardly anybody knows about might have something to do with their lack of cuisine reach.
Portuguese is like the 5th most spoken language in the world. That’s pretty damning.