This recipe is a super traditional take on potato salad, which calls for mayonnaise, but there are tons of versions out there with varying ingredients. If you're not a big mayo fan, opt for a bit of olive oil (about a quarter cup to make the mixture seem creamier) and a flavored mustard, like Dijon, to enhance the flavors. You can also mix in some fresh herbs, like basil, to bring in another layer of flavor.