CHICAGO — A beloved Chicago fast-food chain is breaking into breakfast.
Oak Brook-based hot dog giant Portillo’s is testing out a morning menu at five Chicago-area restaurants starting April 15.
According to the Chicago Tribune, the trial menu will offer five all-new breakfast items, including a Polish sausage, egg and cheese sandwich, a pepper, egg and cheese sandwich and a chocolate cake doughnut, topped with Portillo’s chocolate cake frosting…