Caramelized onion

Recipe for 4 people:

• 2 red onions
• Butter
• sugar
• balsamic vinegar
• salt and pepper

Preparation:

1. Cut the onions into banners
2. Brown in a pan in butter and 1/2 teaspoon of sugar
3. Season with salt and pepper
4. Serve with a drizzle of balsamic vinegar