In a small bowl, whisk together olive oil, garlic, lemon juice, orange juice, Italian seasoning, paprika, onion powder, ground sage, and salt and pepper.
Place the chicken in a large resealable plastic bag or a shallow dish. Pour the oil mixture over the chicken, ensuring all pieces are coated evenly. Seal the bag or cover the dish and refrigerate for 30 minutes to marinate. (For best results, you can marinate longer, up to 2 hours.)
Preheat the oven to 400°F while the chicken marinates.
Transfer the marinated chicken to a rimmed 13-inch x 9-inch baking dish, spreading the pieces out evenly in the pan. Pour any remaining marinade over the chicken.
Arrange slices of lemon, orange, and onion around and under the chicken. Sprinkle generously with thyme, rosemary, salt, and pepper.
Bake uncovered for about 1 hour, or until the chicken is cooked through and juices run clear.
Remove the chicken to a serving platter and garnish with additional chopped fresh herbs, if desired.
Serve & enjoy!