Heat ½ tbsp oil in a medium-sized skillet over medium-high heat and sautee the onions, garlic, and jalapeno until tender, about 2 minutes. Place them in the crockpot.
Add the chicken broth, crushed tomatoes, diced tomatoes with green chilis, spices, beans, corn, chicken, salt, and pepper to the crock pot. Cook on low for 8 hours, or on high for 4.
30 minutes before the soup is done cooking, make the crispy tortilla strips. Heat the remaining 1 ½ tbsp of oil in a medium-size skillet over medium-high heat and cook the tortilla strips until crispy.
Shred the chicken breasts using two forks and mix them into the soup. Serve hot with freshly chopped cilantro and your favorite toppings!