2 boneless skinless chicken breasts (about 1 pound)
4 cups good-quality chicken stock
2 (14-ounce) cans black beans, rinsed and drained
1 (14-ounce) can fire-roasted diced tomatoes, with juice
1 (15-ounce) can whole-kernel corn, drained
1 (4-ounce) can diced green chiles
4 cloves garlic, minced
1-2 dried pasilla (negro) chile peppers*
1 white onion, peeled and diced
2 teaspoons ground cumin
1 teaspoon salt, or more/less to taste
fresh lime wedges
optional garnishes: chopped fresh cilantro, diced avocado, diced red onion, shredded cheese, sour cream, tortilla strips/chips