Roasted chicken gets a stylish French makeover with herbs, carrots, and olives.
Preheat oven to 475 degrees, with rack in top position. On a rimmed baking sheet, toss carrots and onions with oil. Push vegetables to sides of sheet, and place chicken in center. Using your fingers, carefully loosen skin. In a small bowl, combine Dijon and Herbes de Provence. Spread mixture under skin. Season chicken and vegetables with salt and pepper.
Roast until an instant-read thermometer inserted in thickest part of chicken (avoiding bone) registers 165 degrees, 30 to 35 minutes, tossing vegetables once. Transfer chicken to a serving platter, and loosely tent with aluminum foil to keep warm.
Add olives to sheet with vegetables, and gently toss. Return to oven; roast until vegetables begin to brown and liquid has evaporated, about 10 minutes. Remove sheet from oven; add parsley and lemon juice, and toss. Serve chicken alongside vegetables.