Ingredients:

500 g red onions
2 tablespoons brown sugar
3 tablespoons white wine vinegar

30 g butter
Salt to taste
Pepper to taste
Extra virgin olive oil to taste

Preparation:

1. Peel the onions and thinly slice them.
2. Heat the oil and butter in a pan.

3. Add the onions and sauté over medium heat for 10 minutes.
4. Add the brown sugar and stir.
5. Pour in the vinegar and cook for another 10 minutes, stirring frequently.

6. Season with salt and pepper and continue cooking until the onions are soft and caramelized.
7. Serve the caramelized onions warm or at room temperature.