I’m a Texan and bought what from the picture should have been a simple Tex-Mex, folded crisp taco in Kansas City, MO. around 1974.
I forget the other details, but the cheese was American, and the ‘hot sauce’ was ordinary ketchup.
I was also shocked to eat Chili con carne on spaghetti in Kansas City, not too bad by the way.
The taco is as memorable as a hot dog I bought in rural France, the colors and parts were there, a bun, a wiener looking thing, and a mustard of a sort, but it was all totally foreign from an American hot dog.
Chili on spaghetti is a Cincinnati thing. Never saw the point myself.