INGREDIENTS
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2 tablespoons whole-grain or Dijon mustard
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2 tablespoons chopped fresh thyme or 2 teaspoons dried
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2 tablespoons extra-virgin olive oil, divided
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1/2 teaspoon salt, divided
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1/2 teaspoon freshly ground pepper, divided
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1 1/2-2 pounds bone-in chicken thighs, skin removed
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2 medium sweet potatoes, peeled and cut into 1-inch pieces
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1 large red onion, cut into 1-inch wedges