Celery, or more precisely, celeriac, forms fist-sized, fleshy root bulbs. It is the second most commonly used root vegetable in Germany after carrots. Celery is low in calories, with approximately 38 kcal per 100 g, and stimulates the metabolism due to its high content of essential oils, such as Apiol. It also contains minerals like potassium, sodium, and phosphorus. Celeriac is versatile in its applications but is best known as a component of mirepoix. It is highly valued as a flavoring ingredient for meat dishes and stocks. Peeled celery tends to oxidize quickly, and you can prevent the browning by immediately drizzling it with lemon juice.