A skewer of flame-broiled chicken chunks doesn't sound particularly unusual, but there's something about the way this tiny Mill Avenue Turkish spot prepares it that makes it special.  Of course, who knows what secrets are in the marinade, which makes the kebab juicy even though it's served skinless and boneless. And the creamy, potent garlic dip served alongside it brings out the smoky touch of char on the meat.  Combine chunks of that meat with fresh, warm pita, fluffy rice, pickles, salad, and smooth hummus, and you have the makings of a feast.