2 (16 ounce) bags frozen white pearl onions, left frozen, excess ice removed
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¼ cup extra-virgin olive oil
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2 teaspoons sugar
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Salt and freshly ground black pepper to taste
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1 cup balsamic vinegar
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2 garlic cloves, minced
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2 tablespoons chopped fresh parsley
Instructions
Adjust oven rack to low position and heat oven to 425 degrees.
Toss onions with oil, sugar, salt and pepper in medium bowl. Transfer to a cookie sheet with rim in a single layer. Roast onions until golden brown, about 30 minutes, stirring at 20 minutes and again at 25 minutes, adding garlic at this point.
Meanwhile, bring vinegar to boil; simmer over medium-high heat, about 10 minutes, until reduced to 1/3 cup - it should be a thin syrup. Put onions into a bowl, add reduced vinegar and parsley; toss to coat. Serve hot, warm or at room temperature.