So delicous and hearty and EASY!
Preheat oven to 350°
In a sauce pan over medium heat, melt butter and whisk in flour until a roux forms. Stir in broth and let simmer until it becomes thick and bubbly-about 3 minutes. Whisk in sour cream, chilies, cumin, salt and 1 cup Monterey Jack cheese. Do not allow the sauce to boil or the sour cream will "break" meaning it will curdle.
Spread 1/2 cup of sauce in bottom of baking dish that has been sprayed with cooking spray. On a cutting board lay out one flour tortilla. Fill with 1/4 cup chicken and 1/4 cup cheese down the center (you do not need to be exact). Roll the tortilla up and place into the casserole dish. Continue with the remaining tortillas, chicken and cheese.
Pour remaining sauce over enchiladas and top with any remaining cheese. Cover with foil and bake for 25 minutes. Remove the foil and broil for 3 minutes or until the top becomes brown and bubbly.