Celery is low in kilojoules. It is a source of fibre and potassium.
Combining vegetables can make a simple side dish into something much more exciting. Make sure you choose vegetables that will cook in the same amount of time. Try parsnips and carrots, for example, or zucchini and tomatoes. Others can be matched if you parboil the one needing more cooking, such as potato, before combining it with one that cooks faster, such as leeks. Use seasonings that suit both vegetables.