The San Francisco Unified School District plans to open salad bars in the cafeterias of 15 public schools in the city. A pilot program had been initiated in three schools last year and the results were so encouraging that the program was extended. An additional 10 campuses are expected to open their own salad bars by the end of the school year. The salad bars will feature fresh greens, seasonal raw vegetables, fresh fruit and whole-grain baked goods like breads and muffins. It will be offered with the regular hot lunch at no additional charge. The campuses added to the program are mostly high and middle schools, though there is also one elementary school on the list. Preferred Meal Systems will provide the ingredients for the salad bars. The program, part of the district’s wellness initiative, is funded by a $500,000 grant from San Francisco Mayor Gavin Newsom’s office and the city’s Department of Children, Youth and their Families.