Dry brine the chicken: Coat the chicken with salt and spices and let it sit in the refrigerator for at least 4 hours, or preferably overnight.
Preheat oven to 400°F (200°C).
Par-cook the vegetables: Briefly boil the chopped vegetables for 5-7 minutes until slightly tender, or roast separately for 15 minutes.
In a large bowl, toss the par-cooked vegetables with olive oil, minced garlic, rosemary, thyme, smoked paprika, salt, and pepper.
Spread the vegetables evenly in a large roasting pan or a cast-iron skillet.
Arrange the chicken pieces on top of the vegetables, ensuring they are not overcrowded. Use two pans if necessary.
Roast for 45-60 minutes, or until the chicken is cooked through and the vegetables are tender. The internal temperature of the chicken should reach 165°F (74°C).
Broil for the last 2-3 minutes to crisp the chicken skin, watching carefully to prevent burning.
Let the chicken rest for at least 10 minutes before carving.