Mary's Chicken and Black Bean Chili
1 cup chicken broth 1 green bell pepper, seeded and cut into squa… 1 large onion, chopped 1 red bell pepper, seeded and cut into square… 1 rotisserie chicken, meat removed and choppe… 1 tablespoon ground cumin 1 ½ teaspoons salt 2 cloves garlic, chopped 2 tablespoons olive oil 3 (14.5 ounce) cans Mexican-style stewed toma… 3 (15 ounce) cans black beans, rinsed and dra… 3 tablespoons chili powder water, as needed ¼ teaspoon ground black pepper