The McDonald's Southwest Salad with Grilled Chicken and Cilantro Dressing (which comes already on the salad) is 6sp.  It's one of my favorite things to order.  When you order this they also give you a packet of Newmans Own Southwest Ranch, I personally don't use the dressing packet, but the dressing is really tasty-the packet itself is an extra 4sp, so be prepared if you add that to this salad.  This is delicious and so filling!