Roast Chicken and Sweet Potatoes

Ingredients

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