Heat oven to 350

Coat a 9x13 dish with cooking spray

In a large pan, combine broth, chilies, onion, sour cream, salt, cumin, pepper, soup, and garlic; mix well

Bring to a boil, stirring constantly

Remove from heat

Spread 1 cup mixture into the dish

Arrange 6 tortillas over soup mixture and top with 1 cup chicken and 1/2 cup cheese

Repeat layers, ending with cheese

Spread remaining soup mixture over cheese

Bake 30 minutes or until bubbly