The gnarly Celery Root...also know as celeriac, turnip-rooted celery, or knob celery, is a closely related friend of the leafy celery we are used to. You are not going to slather peanut butter on any celery stalks with this variety, instead the important part of this knobby, unassuming veggie is its edible roots. It was mentioned in Homer's Odyssey as selinon so it has been used as food for a LONG time.
Celeriac may be roasted, stewed, blanched, or mashed. Don't let its gruff exterior deter you, underneath it is creamy with sweet and smoky flavor.
Celery Root is great because it has very low starch and, if not allowed to dry out, can be stored for about 4-6 months. It is an excellent source of vitamin K, phosphorus, iron, calcium, copper, manganese, as well as some vitamin C.