Besides this roasted celeriac recipe and Celeriac Remoulade listed above, there are many other vegetarian celeriac recipes to be found. You can chop it up and add to a regular salad. You can also cook it in a variety of ways—try it thinly sliced and topped with cream, then baked as a gratin. You can also boil it until tender and serve like mashed potatoes. You can even spiralize it and either cook it or serve it raw, tossed in a dressing. Perhaps one of the most popular uses for celery root though is to cook it in vegetable broth and purée it into a soup, either by itself or with potatoes, leeks, and even fennel.