Broccoli and Cauliflower Soup Making soup has to be the easiest way to get loads of vegetables into your children. Broccoli and cauliflower are from the cruciferous family (so is kale, cabbage and brussel sprouts) which are full of sulphur containing compounds and glucosinolates, which might help lower your risk of cancer. They are full of antioxidants, vitaminCc,