Slow Cooker Chicken Tortilla Soup

Name: Slow Cooker Chicken Tortilla Soup
Prep time: 10 min
Cook time: 4 h
Total time: 4 h 10 min
Cuisine: American
Ingredients: 1 yellow onion ($0.32); 2 cloves garlic ($0.16); 3/4 lb. boneless, skinless chicken breast ($2.09); 1/2 Tbsp chili powder * ($0.15); 1/2 tsp ground cumin ($0.05); 1/2 tsp smoked paprika ($0.05); 1/4 tsp cayenne pepper (optional) ($0.02); freshly cracked black pepper ($0.03); 1 15oz. can fire roasted tomatoes ($1.00); 1 10oz. can diced tomatoes with green chiles ($0.49); 1 15oz. can black beans ($0.59); 1 cup frozen corn kernels ($0.38); 6 cups chicken broth** ($0.78); 8 6-inch corn tortillas ($0.75); 1 Tbsp cooking oil ($0.02); pinch salt ($0.02); 1 avocado ($1.50); 1/4 bunch cilantro ($0.22); 6 Tbsp sour cream ($0.48); 1 lime ($0.69)