Are you referring to Wilaiwan's in Montpelier? Excellent place that's only open for weekday lunch, and Saturday lunch when the Farmer's Market is running in the summer.
They usually cook large batches of three dishes, and are open 11 AM to 2 PM or whenever they run out, whichever is sooner; and they do seem to frequently run out, I've found that going at 1:45 is not a good plan.