Simple casual but very healthy dish! Onion is very rich in different useful components. Contains a volatile, rich in iron. To obtain this important element from raw and roasted, baked and stewed onions. Today on the first place among onions treasures leaves quercetin - a powerful anticancer element. Onions are rich in potassium beneficial for the cardiovascular system. In addition, onion contains many other minerals and vitamins. In particular and in the follicles, and leaves a lot of ascorbic acid, are b vitamins and PP, and carotene, essential oil and 2 percent protein. In General, you have a lot of reasons for daily use of this miracle vegetable.