We hope you like your salad with a side of fraud, because if you've been dressing it with a balsamic vinaigrette chances are that's what you're getting. Unless you've put down a pretty penny on that dressing, it probably contains no real balsamic in it at all.
Balsamic vinegar, the real kind that comes from Modena in Italy and has been carefully aged to dark brown, syrupy perfection, is, well, expensive. Really expensive. Here's what you need to know:
CORRECTION: A previous version of this article incorrectly identified the process involved in make vinegar and incorrectly stated that balsamic was not technically a vinegar.