A stir fried rice noodle dish found on literally every single night market in Thailand. Phad Thai is a real street food classic. It is pretty much a national dish, though not with a very long history. It became popular in Thailand during, and after world war II.
The recipe shown here is with the original preparation of the Tamarind Sauce, like taught in our Thai cooking lessons with Joy. It is possible to substitute this with the commonly available Tamarind paste.
Recently the Tourism Authority of Thailand published a video about this popular Thai dish: