Dickson's Farmstand, in Chelsea Market—which is, otherwise, a seriously overpriced butcher—serves a remarkably good, pre-made pastrami sandwich on the weekend. It has an old fashioned, home made, crunchy coleslaw on it (vinegar, no mayo) and good, strong mustard. Only problem: it's served stone cold, right out of the fridge. But the quality and taste of the meet makes it worthwhile. You might want to wait at least 1/2 an hour before eating it. It runs around $8 and is normal sized (not Carnegie Deli sized).