By 10 on a recent Saturday morning, the Troy Waterfront Farmers Market was already busy. The market partners with SNAP, or the Supplemental Nutritional Assistance Program. Open Saturdays, the farmers market takes place at the convergence of River and Third Streets in downtown Troy, an area that, like many urban centers, features more convenience stores and eateries than markets. Shoppers looking for an alternative to otherwise limited options can find organic fruits, vegetables and herbs, locally-produced meat, fish, and dairy, in addition to prepared foods from neighborhood businesses,