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 in the dish.
Arrange 6 tortillas over soup mixture (breaking to fit dish) 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.
Note: If you prepare dish a day ahead, cover with nonstick foil and refrigerate. When ready to serve, bake 1 hour; uncover and bake 30 minutes more or until bubbly.