The same goes for pretty much any cuisine. The most unchanged pre-colonials cuisines are maybe French (not all dishes but a lot can be made without too many oversea spices etc) and Mexican (although it's nearly impossible to find authentic meats, since there were no sheep, cow, pork or chicken in Mexico.) There are also regional dishes in each country that are generally more authentic, China has a lot of these but so do even tiny countries if you know where too look.
Indian, Chinese, Italian, Korean, and the vast majority of other cuisines are vastly different. Most of the traditional recipes (not all) have been lost to time or are stuck in some ancient cookbooks nobody bothers with anymore because the more modern post-colonial food that we associate with these cuisines is far better, and often times significantly different because it uses a lot of ingredients that were previously unavailable.