Creating Chicken Taco Soup is a breeze when you follow these simple steps:

1. Heat the Oil: In a large pot, heat the olive oil over medium heat.
2. Cook the Onion and Garlic: Add the diced onion and sauté for about 3-4 minutes until the onion is translucent. Stir in minced garlic and cook for 1 minute more until fragrant.
3. Add Chicken: Place the chicken breasts in the pot and pour in the chicken broth. Use a wooden spoon to combine.
4. Incorporate Vegetables: Add in the diced tomatoes, black beans, and corn.
5. Season: Sprinkle in the taco seasoning and optional cumin. Stir everything together to combine well.
6. Simmer: Bring the mixture to a boil. Once boiling, reduce heat to low, cover, and let it simmer for about 20 minutes until the chicken is cooked through.
7. Shred the Chicken: Remove the chicken breasts from the pot, shred them using two forks, and return the shredded chicken to the soup.
8. Season to Taste: Taste the soup, then adjust salt and pepper as needed.
9. Serve: Ladle the soup into bowls and garnish with your favorite toppings like shredded cheese, sour cream, diced avocado, or cilantro.

Follow these instructions, and you will be rewarded with a warm and fulfilling bowl of Chicken Taco Soup!