Crock Pot Chicken Enchilada Soup

Ingredients

• 2 tsp olive oil
• 1/2 cup onion, chopped
• 3 cloves garlic, minced
• 3 cups low sodium fat-free chicken broth
• 8 oz can tomato sauce
• 1-2 tsp chipotle chili in adobo sauce (or more to taste)
• 1/4 cup chopped cilantro (plus more for garnish)
• 15 oz can black beans, rinsed and drained
• 14.5 oz can petite diced tomatoes
• 2 cups frozen corn
• 1 tsp cumin
• 1/2 tsp dried oregano
• 2 8 oz skinless chicken breasts (16 oz total)
• 1/4 cup chopped scallions, for topping
• 3/4 cup shredded reduced fat cheddar cheese
• fat free sour cream (optional)