Add avocado oil to a large soup pot, and saute onion until it's translucent, about 7-10 minutes.
Add the diced tomatoes, tomato paste, and spices and salt into the pot, and stir to combine.
Into the soup pot, add the chicken broth. Bring to a simmer, and allow the mixture to simmer for about 20 minutes.
Add the carrot, bell peppers, and chicken, and continue to cook for about 10 minutes.
Add the peppers, carrots, and chicken, and continue to simmer another 10 minutes, until the vegetables have softened.
Add the zucchini and corn, and stir in. Turn the heat off to allow the veggies to stay crisp.
Add tortilla strips (if using) to bowls, and ladle the soup over them. If desired, top with cheese, cilantro, and additional lime wedges. Avocado and sour cream are awesome toppings as well!