INGREDIENTS
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1 tablespoon butter
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1 small onion, finely chopped
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1 clove garlic, minced
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1 cup Dijon mustard
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3/4 cup firmly packed brown sugar
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3/4 cup distilled white vinegar
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1 tablespoon hot sauce (preferably Crystal), or more to taste
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Coarse salt (kosher or sea) and freshly ground black pepper