Heat the olive oil in a large soup pot over medium heat.
Sauté the tortilla strips until slightly crisp and browned.
Remove them and set aside for later.
In the same pot, add chopped onion, minced garlic, and jalapeño.
Cook until the onion is translucent and fragrant.
Stir in the crushed tomatoes and chicken broth.
Bring the mixture to a simmer, letting it cook for about 15 minutes.
Add the cooked chicken and corn kernels to the pot.
Continue to simmer until the soup is heated through.
For serving, reheat the soup on low and add diced avocado.
Ladle the soup into bowls and garnish with cheese, sour cream, and chopped cilantro.
Enjoy fresh with crispy tortilla strips on top!