Heat the olive oil in a large pot or Dutch oven over medium-high heat. Add the chopped red onion and diced jalapeño, cooking for about 3 to 4 minutes until the onion becomes tender. Stir in the minced garlic and cook for another 30 seconds until fragrant.
(1 tbsp. olive oil, 1 small red onion, 1 medium jalapeño, 3 cloves garlic, minced)
Add the chicken breasts, fire-roasted corn, and diced green chiles to the pot. Sprinkle in the Tajín seasoning, ground cumin, chili powder, salt, and black pepper, stirring well to coat all the ingredients evenly.
(2 [12 oz.] skinless, boneless chicken breasts, 1 [12 oz.] package fire-roasted frozen corn, 1 [4 oz.] can diced green chiles, 1 tbsp. Tajín seasoning, 2 tsps. ground cumin, 2 tsps. chili powder, 1/2 tsp table salt, 1/4 tsp finely ground black pepper)
Pour in the chicken stock and bring the mixture to a boil. Once boiling, reduce the heat to low, cover the pot, and let it simmer gently for 25 minutes to fully cook the chicken and meld the flavors.
(4 cups [32 oz.] chicken stock or low-sodium chicken broth)
After 25 minutes, remove the chicken from the pot and shred it into bite-sized pieces using two forks. Return the shredded chicken to the soup.
Add the sour cream, shredded Monterey Jack cheese, fresh lime juice, and chopped cilantro to the pot. Stir to combine and let the soup continue to simmer on low for another 3 minutes until everything is heated through and creamy.
(2 cups full-fat sour cream or Greek yogurt, 1/2 cup shredded Monterey Jack cheese, juice of one lime, 1/4 cup chopped cilantro)
Ladle the soup into bowls and garnish with crumbled queso fresco, a squeeze of lime, and a sprinkle of fresh cilantro for a bright, flavorful finish.
(1/2 cup crumbled queso fresco, lime wedges and chopped cilantro for garnish)