An apple a day keeps the doctor away - an onion a day keeps everyone away!
...unless we are talking about these mild and sweet marinated red onions, which go perfectly with hamburgers or in Halloumi Baguette.
1 large red onion
0,5 dl balsamic vinegar
1 dl vegetable oil
2 teaspoons sugar
0,5 teaspoon salt
Cut the onion to thin slices.
Mix all ingredients and let rest in the fridge for at least 2 hours, mixing it every now and then.