Below link is a Ted Talk given by research Jennifer Lee discussing the adaption that the Chinese immigrants made when settling down to US to promote Chinese cuisine to their western customers. As a result, items such as fortune cookies, general tso, sweet and sour chicken became popular menus in US. Jennifer Lee discusses the true identiy behind these menus and the response by actual people in China learning about these adaptions of their food in different countries.
https://www.youtube.com/watch?v=45MzeJIyvq4