How to Make It
Heat oil in a large Dutch oven over medium. Add onion, celery, and carrots; cook, stirring occasionally, 5 minutes. Add mushrooms and garlic; cook, stirring often, 3 minutes. Stir in stock, thyme, bay leaves, and chickpeas; bring to a simmer. Add chicken, salt, and red pepper; cover and simmer until chicken is done, about 25 minutes.
Remove chicken from Dutch oven; cool slightly. Shred meat with 2 forks; discard bones. Stir chicken and kale into soup; cover and simmer until kale is just tender, about 5 minutes. Discard thyme sprigs and bay leaves.