In a large pot cook chopped onion, garlic, peppers, and cumin seed in hot oil about 5 minutes or until tender, stirring constantly. Add corn kernels, tomatoes, chicken broth, shredded cooked chicken, and the snipped cilantro. Bring mixture to boiling; reduce heat. Simmer, covered, for 10 minutes.
To serve, divide the 2 cups crushed tortilla chips among 6 soup bowls. Ladle soup atop crushed chips. Garnish each bowl of soup with shredded cheese, additional tortilla chips, lime wedges, and fresh cilantro, if desired. Makes 6 servings.