HIGHLAND PARK – She wasn’t at the beauty shop for a haircut. She came for the down-home food. “How you doing, honey?” said Joan Haywood, 67, walking through the door of Shep’s Barber and Beauty Shop. “I want three.” Dorothy Grigsby, the shop’s 76-year-old owner, took a break from styling her client’s hair and walked over to a counter, where there were several jars of a green relish flecked with yellows and reds. Seven dollars each.