玉ねぎ (tamanegi), or onion, is a widely used vegetable known for its distinct flavor and aroma. It belongs to the ユリ科 (Lily family) and is cultivated in many parts of the world. Onions can be found in various colors, including white, yellow, and red, each offering a unique taste profile. They are often used in cooking to enhance the flavor of dishes. In addition to their culinary uses, 玉ねぎ also has health benefits. They are rich in vitamins, minerals, and antioxidants, which can support the immune system and promote heart health. Onions are low in calories, making them a popular choice for healthy diets.