PHOTO PROVIDED Pictures of sandwiches served as part of Rochester City School District lunches on Monday and Tuesday. Rochester City School District spokesperson Marisol Lopez said Tuesday that the district is making every effort to find qualified people to fill food manager roles. “Twenty-one of our certified food managers have retired or taken positions elsewhere,” said Lopez. “We’re trying and we’re having a hard time with it.” The lack of certified L-1 and L-2 food managers is one of the reasons why students will not receive hot lunches this school year. The district has served frozen meals shipped in from a Long Island vendor, Tasty Foods, until this week, when they received sandwiches “that didn’t meet their standard.”