Prudential Center owner Boston Properties this week opens a farmers’ market on the building’s cement plaza bordering Boylston Street.  The market, which will run on Thursdays from 11 a.m. to 6 p.m., is directly managed by 14 vendors, including six to eight farmers. Vendors who have signed on to the project sell products like Asian greens, mozzarella cheese, chocolates, bread, baked goods, and high-end desserts.  According to The Boston Globe, it has also sparked interest from Legal Seafoods, whose Prudential Center executive chef, Kevin Watson, has committed to buying fresh foods from the market to use in his cooking.  Sel De La Terre will be doing a version of their Boulangerie with salads, sandwiches, bread, pastry and produce from Frank McClelland’s new farm, and L’Espalier has also expressed interest.  Vendors include Bolton Flats Asian Greens, Taza chocolate, When Pigs Fly bread, Stillman meat, Gilson herbs (one of our Garden Club speakers from long ago), and many more who will be added as the season progresses.