What cafeteria worker voiced by a soul singer returned in the 140th episode of South Park ?
The Return of Chef:  The 140th episode of the series overall, it first aired on Comedy Central in the United States on March 22, 2006. Chef (South Park): Jerome "Chef" McElroy is a cartoon character on the Comedy Central series "South Park" who was voiced by soul singer Isaac Hayes. Chef (South Park):  A cafeteria worker (as his nickname implies) at the local elementary school in the town of South Park, Colorado, Chef is generally portrayed as more level-headed than the other adult residents of the town, and sympathetic to the kids.
Jerome "Chef" McElroy