The Ugly Duckling of the Vegetable World: Celeriac Celeriac, the unsung frog prince of winter vegetables, also known as celery root, knob celery and turnip-rooted celery. Peel off its warty exterior and you’ll uncover the royal vegetable within: a perfect, ivory-fleshed, winter alternative to potatoes and other starch vegetables. It is surprising that a vegetable that is so delicious and wonderfully hearty, is practically unknown to the wider population –…