Organic Broccoli Raab is not actually related to broccoli. It is however, closely related to turnips, which explains why the leaves look a lot like turnip greens. Broccoli Raab probably descends from a wild herb related to the turnip that grew either in China or the Mediterranean region. Broccoli Raab, also known as Rapini, is a common vegetable in the cuisines of Italy, Spain, and China.