What you’ll need
Peel, cut in half and thinly slice the onions with a mandoline or with a knife.
In a large frying pan heat 1 tbsp of olive oil. Add onions and sweat on medium heat.
Add butter. Cook onions on low heat for about 30-40min until caramalized. Stir occasionally.
Your onions should look like this.
Deglaze pan with 1 tbsp of balsamic vinegar. Add salt and pepper. Transfer to a plate and let cool.
In a bowl mix sour cream, onions, chopped chives, honey, salt and pepper.