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.
Looks like what we called Chop Suey in the eastern half of the US at Chinese restaurants. One of the owners confessed that originally Chop Suey was the Chinese equivalent of Kitchen Sink Soup. That was all the leftovers and they put them in a starchy sauce, and stupid Americans ate it and loved it.