Asian slaw is good! Or a cauliflower/cashew salad. Others have mentioned grilled corn or grilled vegies and I love those in the summer. Cut up watermelon and cantaloupe and sliced tomatoes are great too. These are local in NC in the summer and are usually on sale somewhere. We also have a lot of roadside stands selling produce in the summer. Southern Living magazine has a website with great summer barbeque ideas. They always have recipes for anything you could want to serve. It's a great resource.