So did tomatoes and peppers and potatoes. Could you imagine any of the "ethnic" cuisines without those things. Italian food without tomatoes? Asian food without hot peppers? French food without chocolate? LOL!!! So could any of their cuisines really be called indigenous either? As for some food that I would consider "indigenous American cuisine": succotash, clam chowder (chowder in any from is really very American), BBQ as it has evolved here, and many other items that may have had their start as something else but have become something all together different, such as hamburgers.