Kale or borecole is a form of cabbage in which the central leaves do not form a head. It is considered to be closer to wild cabbage than most domesticated forms. Turns out there's quite a bit of science behind this super food hype. Kale is an excellent, potent source of Vitamin K, Vitamin A, Vitamin C, fiber and carotenoids.
Research has also shown that kale contains 45 different flavonoids with a variety of antioxidant and anti-inflammatory effects. The name borecole originates from the Dutch boerenkool (farmer's cabbage). Here in the Netherlands we usually serve borecole with a smoked sausage.
(thanks Miss Rare)