Here is how to make this fajita soup on the stovetop instead of the slow cooker.
Saute the peppers and onions in olive oil until tender. Add the garlic and spices. Cook for one minute.
Add the chicken broth and tomatoes. Bring to a simmer.
Once simmering, add the chicken and cover the soup. Cook for 10-15 minutes until the chicken is cooked through.
Carefully remove the chicken and shred using two forks.
Add the chicken back to the soup. Taste and season as needed.