Creating this amazing Chicken Tortilla Soup is straightforward when you follow these easy steps:

1. Heat Oil: In a large pot, heat the olive oil over medium heat.
2. Sauté Vegetables: Add the chopped onion and cook until translucent, about 3-4 minutes. Stir in the minced garlic, bell pepper, and jalapeño (if using), and cook for another 2-3 minutes.
3. Add Chicken: Stir in the shredded chicken, allowing it to absorb the flavors for a minute.
4. Pour Broth: Add the chicken broth to the pot, followed by the diced tomatoes (with their juices), black beans, cumin, chili powder, salt, and pepper.
5. Bring to Boil: Increase the heat and bring the mixture to a boil. Once boiling, reduce the heat to low and let it simmer for 15 minutes.
6. Add Corn: Stir in the corn and lime juice, allowing it to heat through for another 2-3 minutes.
7. Taste and Adjust: Before serving, taste the soup and adjust the seasoning as necessary.
8. Serve Hot: Ladle the soup into bowls, topping each with crispy tortilla strips, fresh cilantro, and avocado if desired. Add a dollop of sour cream for extra richness.

These steps will guide you in creating a delicious Chicken Tortilla Soup that everyone will love.