Onion soup is one of the most popular homemade dishes in France. It occupies an important place in France, just as the miso soup in Japan, and red soup in Russia. It is a classic in the traditional diets, which shows the specific dietary customs and culture of the country.

The history of French onion soup dates back to the 18th century. Once, King Louis XV got lost when he went hunting in the mountain. He did not return to the cabin in the woods until late at night. Being tired and hungry, what he could find were only some cheese, onions and slices of dried bread. So he mixed them together and cooked the onion soup. Although the ingredients were so simple, he felt it was very delicious. So after he got back to the palace, he commanded the chefs to cook the soup for him. As a result, the delicious onion soup became a classic dish, and spread till now.

As the main ingredient, onion enjoys the reputation of "the queen of vegetables". It has various significant effects in appetizing and refreshing, sugar-decreasing and lipid-lowering, antioxidation and anti-aging, calcium supplementation, as well as the prevention of osteoporosis. It can provide a variety of nutrients to human body, such as B vitamins, dietary fiber, and potassium. Eating onions will bring the diuretic effect, so it is often used to improve blood circulation, and help alleviate cardiovascular disease. If you add some cheese in the onion soup, the heavy milk flavor of cheese can not only alleviate the spicy taste of the onion, but can also reduce its irritation on the stomach. French people like to eat dry bread with onion soup. Such a way can promote the absorption of the rich protein and calcium in the soup for the body.

Onion soup not only has long enjoyed a good reputation in French, it is also very popular in the rest of the world. According to the data from French Consumer Association, in every 100 grams of onion soup, there is 1.8 grams of protein, 2.7 grams of fat, 2.5 grams of carbohydrate, 1.4 grams of polysaccharide and 0.6 grams of dietary fiber. So we can see that it is really a nutritional and balanced food for human body. However, French nutritionists and dietary specialists also remind that people should pay attention to the eating amount of onion, with 1/4 onion for the children and 3/4 for the adults every meal.