"Any leftover onions would be delicious layered in a chicken, turkey, pork, or roast beef sandwich. From Bon Appetit, January 2010...."
INGREDIENTS
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1 large red onion, halved through core, thinly sliced crosswise
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1/2 cup sugar
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1/2 cup white wine vinegar
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1 1/2 teaspoons coarse kosher salt
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1 1/2 teaspoons whole black peppercorns
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1/2 cinnamon stick