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 on top of the vegetables. Tuck the bay leaf into the broth and pour the chicken broth around the chicken, not directly over it.
04 - Cover and cook on LOW setting for 6–7 hours, or until the chicken reaches an internal temperature of 165°F and vegetables are fork-tender.
05 - Using tongs, carefully transfer the chicken and vegetables to a serving platter. Remove and 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 and serve with tender vegetables alongside, spooning gravy over portions if desired.