Melting Pot Tours offers "Food Tasting Walking Tours" of Farmers Market and Third Street, on Fridays and Saturdays. The tours begin and conclude at the Market. I went on one and gluttoned.
(If words like disrespect and agent can be made into verbs, why not glutton? Take the tour, you'll understand.)
Tour guides Diane and Lisa work with the merchants at Farmers Market and along Third Street to combine food tastings with tales of history and intrigue. Frankly, put a plate of savory meats from Pampas or macaroni'n'cheese from Joan's on Third in front of me and I'll listen to anything you want to say--but the stories are truly interesting and lots of fun.
The Farmers Market/Third Street tours are limited to 12 persons each, so reserve early. And get up early; they start at 9:30 am.