Crockpot Chipotle Chicken Soup

large chicken breasts (boneless, skinless)

medium onion (chopped)

celery (chopped small)

black beans (drained)

corn (drained)

diced tomatoes (with juices)

garlic cloves (minced)

chipotle chilis (chopped) + 1 tablespoon adobo sauce

chili powder

chicken or vegetable broth

Salt & pepper (to taste)

cilantro (chopped)

Lime wedges (optional)

Tortilla strips (optional, to taste)

Sour cream or Greek yogurt (optional, to taste)