I live in Hong Kong and it feels like most American fast food here involves oil and deep fried food. Then I remembered at one point HK local fast food were full of MSGs.
It led me to this question. What is your local fast food obsessed with? It can be an ingredient, spice, sauce, cooking method, etc.
I live in France. For a time we had loads of poke places, still do. Insane that people pay €14 for a bowl of rice…
The biggest up-and-comer now is smash burgers (€15 burger prepared in 5 minutes anyone?), but might be tied with fried chicken which is also everywhere.
Prior to this we had a wave of French Taco joints (which are not tacos at all!).
I don’t live in a very large city though, so perhaps Paris, Marseille, and Toulouse have trends I haven’t seen yet.