Most authentic Thai food in Boston.
The Pad Thai cafe is a great secret, and I hope that they can make it. It is simply the best, most authentic Thai food I've had in the city. Most Thai restaurants give an odd, overly Americanized version of Thai food that would be unrecognizable to anyone from Thailand, but here, you can get real laab, sam tam, sticky rice, and so on. Grab a can of grass jelly drink while you're at it. Be sure to get the authentic Thai menu!