Step 2
Heat oil in a Dutch oven over medium heat. Add chicken. Cook, stirring occasionally, until no longer pink inside, 5 to 7 minutes. Add carrots, celery, bell pepper, and scallions and cook until tender, about 5 minutes. Add tomatoes, black beans, chili powder, cumin, garlic, onion powder, paprika, salt, and black pepper. Stir to combine. Cook until heated through, about 5 minutes more.