Ingredients

Makes about 2 cups

　　1 tablespoon vegetable or canola oil

　　4 yellow onions, thinly sliced

　　1/2 teaspoon ground cloves

　　1 teaspoon salt

　　1 teaspoon freshly ground black pepper

　　3 tablespoons brown sugar

　　Zest from 1/2 orange

　　2/3 cup balsamic vinegar

　　

Step 1

Heat the oil over medium heat in a large skillet. Add the onions and cook, stirring occasionally, until they are soft and caramelized, about 20 minutes. Add the cloves, salt, and pepper, stirring to coat.

　　

Step 2

Reduce the heat to medium-low and add the brown sugar and orange zest. Cook, stirring frequently, until the onions start to shrivel. Add the vinegar, reduce the heat to low, and cook for 1 1/2 hours, stirring occasionally. Adjust the seasoning to taste and serve warm. Leftovers can be stored in the refrigerator, tightly sealed, for about a week.

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