Cambridge is a mecca for Eastern food, but this place is my vote for the best food. It's a bit out of the way (a 10-15 minute walk from the Elizabeth Road roundabout), and it's lunch hours are kind of short (open from 12 -2 or the like, as I remember), but every bite is delicious and not another tourist in sight. Good beer too.
Better arrive for lunch before 12 tho, there's usually a line by 11.45.
Favorite Dish: Everything, but I always like the green curry.