Excellent to serve as a starter or as an accompaniment to a second, sweet and sour onions can be prepared instantly or canned to have them available as many times as desired. They are a great classic of vegetables in jars and go perfectly with a good plate of charcuterie or cheese.
To prepare sweet and sour onions, you need very few ingredients: fresh, firm onions with no bruises; a good vinegar with 6% acidity; sugar to taste; water and, if desired, flavorings. Once ready, they can be kept for a few months in the pantry, keeping them in the fridge for a few hours before trying them.
If Tropea onions can be used to prepare the excellent red onion jam we have already mentioned in the recipe for sweet and sour in a jar, it lends itself particularly well to small white onions.