Onion is a fundamental vegetable in global cuisine, recognized for its distinct flavor and aromatic qualities. Available in various types such as red, white, and yellow, onions are rich in vitamins, minerals, and antioxidants, particularly vitamin C and quercetin. They can be eaten raw, cooked, or used as a base in numerous dishes, adding depth and complexity to flavors. Onions are known for their potential health benefits, including anti-inflammatory properties and the ability to support heart health, making them an essential ingredient in both everyday cooking and gourmet recipes.