I don't have any regional dishes for you...sorry. When we lived in Hawaii in the early 70s, you could not get any Mexican food. I finally found corn tortillas, packaged in a can, in the freezer section of a Chinese market. Those were pretty strange. Later, they got the Mexican food bug over there and all kinds of Mexican foods started arriving.
Oh...wait...I know...my grandmother was Bohemian and from N. Dakota. Her family dish was Beef Goulash. Lots and lots of sweet paprika.