1 large onion, chopped
1 tablespoon canola oil
4 garlic cloves, minced
4 cups reduced-sodium chicken broth
2 cans (15 ounces each) pinto beans, rinsed and drained
2 cans (14-1/2 ounces each) fire-roasted diced tomatoes, undrained
3 cups frozen corn
2 chipotle peppers in adobo sauce, seeded and minced
2 teaspoons adobo sauce
1 teaspoon ground cumin
1/4 teaspoon pepper
2 cups cubed cooked chicken breast
1/2 cup fat-free sour cream
1/4 cup minced fresh cilantro