First, add the onion, carrots, radish and lemon into a roasting pan or a Le Creuset dutch oven.
Drizzle with 1 tablespoon of olive oil, 1 teaspoon diamond kosher crystal salt and 1/4 teaspoon of pepper.
Mix together with your hands until the vegetables and lemon are coated well.
Next, remove the giblets from the chicken and pat it dry with paper towels.
Season the entire chicken with 1 tablespoon of kosher salt- including the inside of the bird. Also, season with 1/2 teaspoon of black pepper.
Once, seasoned, stuff the chicken with the other lemon, garlic, onion and herbs.
Truss the chicken using kitchen twine.
Set the chicken on top of the bed of vegetables and brush with melted butter.
Place the chicken into the oven uncovered at 400℉ and cook for 1 1/2 hours or until the juices from the leg run clear.