Cauliflower is full of sulfur compounds called glucosinolates such as the powerful sulforaphane and isothiocyanates which have been studied to be very effective for phase II liver detoxification and as cancer stem cell neutralizing agents.
Onions are also a staple in my cooking; however, raw onions are better because they contain sulfurcompounds that are fullof vital nutrients, and cooking can kill off the sulfur.