It’s hard to beat a classic potato salad made with creamy mayonnaise. But good news for the mayo-averse: The winning combination of potatoes and mayo isn’t where this backyard barbecue favorite ends. There are a number of condiments that work equally well as a potato salad dressing—so whether you’re in need of a mayo substitute or you’re simply in the mood to bring something different to the party this year, you’ve got plenty of options. Tahini The sesame paste most commonly used to make hummus not only lends creaminess to potato salad, but also adds nutty, toasted flavor. It’s sure to have people guessing what the secret ingredient in your salad is. Pesto Stir pesto into most things and it will be better—and that definitely includes potato salad. Pick up your favorite store-bought brand to keep things easy on yourself, or if you have an abundance of basil in your …