This mesmerizing vegetable is actually an exotic variant of the cauliflower. If you re feeling tripped out while looking at it, that s because it is a natural approximation of a fractal. In fact, the spirals on the head of romanesco follow the Fibonacci pattern so toss one into your next stir fry if you really want to impress that math geek friend of yours. Not only will you feel smarter eating one, you ll probably be healthier too. Romanesco is an excellent source of vitamin C, vitamin K, fiber and carotenoids.