Celery Root Gratin is a delicious and comforting side dish made with thinly sliced celery root, cream, and cheese. The celery root is tender and creamy, while the cheese adds a rich and savory flavor. This gratin is perfect for a holiday meal or any time you want a hearty and satisfying side dish. It pairs well with roasted meats or can be enjoyed on its own as a vegetarian main course.