Many vegetables are leafy. Most leaves can be eaten, and many leaves contain many vitamins and minerals.
The vegetables grown especially for their leaves mostly belong to a group that includes cauliflower, broccoli, cabbage and brussels sprouts. Scientists call them brassicas.
Most green vegetables lose their nourishment if they are boiled for too long, so they are best boiled for a short time, and used while they are still crisp, or steamed. Most can also be stir-fried.