Under the Jones Falls Expressway, at Holliday and Saratoga is the Baltimore Farmers Market. The market goes from April to December. Next Sunday, 12/23 is the last Sunday of the season. I think you should go.
The Market has a variety of vendors: vegetables, meats, cheeses, clothes, jewelry, Zeke's coffee, great turkey burgers, brisket, cookies, breads, and even Christmas trees.
Learn more about the market at: http://www.promotionandarts.com/index.cfm?page=events&id=3.