The red onion, originating from Spain, is a prominent ingredient in Mediterranean cuisine, valued for its flavor and nutritional properties. This type of onion is recommended to be eaten raw to maximize its benefits, being rich in vitamins A, B1, C, E, as well as minerals and folic acid. Known for its digestive and appetizer properties, a tip to alleviate irritation when cutting it is to place it in the freezer for 10 minutes, though it shouldn't be left too long, as it will lose its aroma. Storage should be in a cool, dry place away from light.