Onions Agrodolce (Sweet and Sour Onions)

From Elizabeth David's 'A Book of Mediterranean Food'.

• Ready In: 30 mins
• Serves: 4-6

Ingredients

• 25  small onions, peeled
• 3  tablespoons olive oil
• 1⁄4 cup port wine
• 1⁄4 cup red wine vinegar or 1⁄4 cup  balsamic vinegar
• 2  tablespoons brown sugar
• 1⁄4 cup raisins
•  salt
•  cayenne pepper

Directions

1. Put the onions in a heavy saucepan with the olive oil over moderately-high heat.
2. As soon as the onions start to brown, add the port, vinegar, brown sugar raisins and salt and cayenne pepper to taste.
3. Simmer slowly until the onions are quite soft and the sauce has turned to a thick syrup.
4. Serve at room temperature with roast or grilled meats.