Onions are one of the few foods that can be sweet, savoury, spicy, and aromatic all at the same time. Onions, in a sense, are what makes food delicious—they take it beyond simple sustenance and make it delightful and taste delicious.
Onions don’t provide a lot of nutritional value. Sure, there are a few vitamins and minerals, but nothing that isn’t abundant in other regularly consumed foods like rice or broccoli. In addition, onions aren’t required in any recipe.