When the mercury starts to rise in your favorite weather app, it means one thing: It's picnic season. And no picnic, or BBQ, or summer potluck, or cookout, or... well you get the point... is complete without potato salad. It's the ultimate side dish and a surefire crowd-pleaser. But it sure can pack on the calories when loaded with mayo and starch. That's why we're here to help. With these 25 lightened up recipes your waistline won't be hurting after digging in. Grab your fork. You'll want seconds of these no-dud spuds, and you can go ahead and have them.