The first Rochester outlet, at 15???1st Av. SW., has about 40 employees.Grant Benson, Dunkin??? Donuts vice president for franchising, said it is also targeting Minneapolis, Mankato and Duluth for outlets ???in the years to come.???The push into Minnesota is part of a national expansion that saw the chain make inroads last year in Salt Lake City, Dallas, Houston and other markets far from its Mass