INGREDIENTS
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1 tablespoon olive oil
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3 large white onions, thinly sliced
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2 tablespoons brown sugar
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1/4 teaspoons salt
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3 baking potatoes (such as Yukon gold, about 2 lb), peeled and cubed
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6 parsnips (about 1 lb), peeled and cut into 1-inch pieces
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1 1/2 cups low-sodium chicken broth, heated
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1/4 cup crumbled blue cheese
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3 tablespoon fresh thyme, chopped