Add diced onion and cook for 4 minutes until softened.
Stir in garlic and cook for 30 seconds.
Add cumin, chili powder, smoked paprika, salt, and black pepper.
Stir continuously for 1 minute to bloom the spices.
Add chicken breast and coat with the spice mixture.
Add chicken breast and coat with the spice mixture.
Pour in fire-roasted tomatoes, tomato paste, and chicken broth.
Bring to a gentle boil.
Reduce heat and simmer for 20 minutes.
Remove chicken and shred using two forks.
Return shredded chicken to the pot.
Add black beans and corn.
Simmer for another 10 minutes.
Stir in lime juice and fresh cilantro.
Taste and adjust seasoning.
Ladle into serving bowls.
Top with avocado, tortilla strips, cheese, sour cream, and lime wedges.
Serve immediately.