"Not only is this jam great on burgers, it is perfect served alongside grilled or roasted meats or as an addition to a cheese and charcuterie plate...."
INGREDIENTS
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2 tablespoons olive oil
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2 tablespoons unsalted butter
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4 cups thinly sliced red onion
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1/2 cup apple cider
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1/2 cup cider vinegar
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1/4 cup sugar
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1 sprig fresh rosemary
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1/4 teaspoon sea salt
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1/4 teaspoon freshly ground black pepper