"We especially like the combination of parsnips, kohlrabi, and celery root in this bacony mash. Prepare the dish a day ahead to allow the flavors to meld (and save time on Thanksgiving Day)...."
INGREDIENTS
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1/2 cup apple cider vinegar
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2 tablespoons yellow mustard seeds
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4-5 pounds mixed root vegetables (such as parsnips, kohlrabi, celery root, turnips, and rutabagas), peeled, cut into 1-inch cubes
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1/2 pound thick-cut applewood-smoked bacon, diced
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1 large white onion, diced
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1 tablespoon (packed) dark brown sugar
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Kosher salt and freshly ground black pepper
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2 tablespoons chopped flat-leaf parsley