Onion is a very common cheap home cooking. The meat is tender, juicy and spicy, with good quality, suitable for raw food. It is native to western Asia and is cultivated throughout China and is available in all seasons. The edible part of the onion is the underground bulb (that is, the shallot). In foreign countries, it is known as the "Queen of Dishes" with high nutritional value.
The nutrients contained in every 100g onion (white peel) are as follows:
| Heat (39kCal) | Carotene (20μg) | Calcium (24mg) | Zinc (0.23mg) |
| Protein (1.1g) | Thiamine (0.03mg) | Phosphorus (39mg) | Selenium (0.92μg) |
| Fat (0.2g) | Riboflavin (0.03mg) | Sodium (4.4mg) | Copper (0.05mg) |
| Carbohydrate (9g) | Nigolic acid (0.30mg) | Magnesium (15mg) | Manganese (0.14mg) |
| Dietary fiber (0.9g) | Vitamin C (8.00mg) | Iron (0.6mg) | Potassium (147mg) |
| Vitamin A (3μg) | Vitamin E (0.14mg) |
