Formally known as celeriac, this root veggie resembles a potato that’s been in a fistfight. Don’t be deterred. The tender yellow flesh has a unique celery-meets-parsley flavor that’s an ideal addition to stews, gratins, and casseroles. As summer transitions to fall, Sonoskus also recommends pureeing it to use as the base of a creamy soup or chowder. And when guests ask how you got that distinctive flavor, tell them it’s just potato. Every Southerner needs a secret ingredient.