01 - Rub the chicken all over with olive oil, salt, pepper, paprika, thyme, and rosemary.
02 - Place carrots, potatoes, celery, onion, and garlic in the bottom of the crockpot.
03 - Set the whole chicken on top of the vegetables. Add the bay leaf and pour the chicken broth around (not over) the chicken.
04 - Cover and cook on LOW for 6–7 hours, or until the chicken is cooked through (internal temperature reaches 165°F) and vegetables are tender.
05 - Carefully transfer the chicken and vegetables to a serving platter. Remove and discard the bay leaf.
06 - For gravy, pour the cooking liquid into a saucepan. Mix cornstarch and cold water, then whisk into the liquid. Bring to a simmer over medium heat, stirring until thickened (about 2–3 minutes).
07 - Carve the chicken and serve with vegetables and gravy.