On May 15, the Uphams Corner Branch Library (500 Columbia Road in Dorchester) will host an event on affordable, healthy foods. At 4pm, Molly Shaw, Senior Nutritionist at Upham's Corner Health Center, will explain what healthy foods are and how to buy them on a tight budget. Amongst several topics, reading food labels and individual serving portions will be discussed. For more info, call 617-265-0139 or visit http://www.bpl.org/branches/uphams.htm