Cauliflower

Cauliflower is low in fat, high in dietary fiber, folate, water and vitamin C, possessing a very high nutritional density,phytochemicals which are beneficial to human health, including sulforaphane, an anti-cancer compound, indole-3-carbinol work as an anti-estrogen, appears to slow or prevent the growth of tumors of the breast and prostate, glucosinolates may improve the liver's ability to detoxify carcinogenic substances.

read more at http://en.wikipedia.org/wiki/Cauliflower.