Which side dish disappears first at your BBQ?

The meat gets plenty of attention, but which side has people going back for another helping? Beans, slaw, potato salad, mac and cheese, something off the smoker—or a family favorite we might not have tried? Tell us what you serve it with and what makes your version worth making. Bonus points for something you can prepare ahead so you're not juggling everything while the meat finishes. If you've added the recipe here on Just BBQ, drop the link so people can find it again.