01 - Rub the chicken all over with olive oil, salt, pepper, paprika, thyme, and rosemary, ensuring even coverage.
02 - Arrange carrots, potatoes, celery, onion, and garlic in an even layer at the bottom of the crockpot.
03 - Place the seasoned whole chicken directly on top of the vegetables. Tuck the bay leaf into the broth and pour the chicken broth around the chicken, avoiding pouring over the seasoned skin.
04 - Cover and cook on LOW setting for 6–7 hours, until the chicken reaches an internal temperature of 165°F and vegetables are fork-tender.
05 - Carefully lift the chicken and vegetables to a serving platter using tongs. Discard the bay leaf.
06 - Pour the cooking liquid into a saucepan. Whisk together cornstarch and cold water until smooth, then stir into the hot liquid. Bring to a simmer over medium heat, stirring constantly for 2–3 minutes until thickened.
07 - Carve the chicken into serving pieces and arrange alongside the vegetables. Drizzle with gravy if desired and serve immediately.