Something that would have been known as age-old by the time the enlightenment started to set in. So that's what, 1300's as the cutoff? 300 years is barely enough to establish a town pub.

For the record, I'm a Finn. By my own definition, there are maybe only three traditional Finnish foods that have survived that long. Carelian stew, särä, and maybe robber's roast (clay-pit mutton).

Whereas something like wine leaf rolls from Greece, Turkey and Lebanon - now those can be properly traditional.