No summertime barbecue or picnic is complete without a few good side dishes, and a scoop of potato salad makes a great addition to a juicy cheeseburger, a plate of smoky ribs, or a hearty deli sandwich. To me, a good potato salad has a satisfying mix of textures, and enough flavor to liven up the potatoes without overpowering them. With barbecue season upon us, I decided to try the house-brand potato salads from Wegmans, Trader Joe's, and Whole Foods to see how they compare.