1 cup dried pinto beans, rinsed
1 jar (11 ounces) mild or medium salsa (1 1/2 cups)
2 tablespoons chopped canned chipotle chiles in adobo sauce
2 tablespoons all-purpose flour
1 1/2 pounds boneless, skinless chicken thighs (about 8)
Coarse salt and ground pepper
1 medium red onion, chopped
1 red bell pepper (ribs and seeds removed), chopped
1/4 cup reduced-fat sour cream, for serving
1/4 cup chopped fresh cilantro, for serving