Reduce heat to low and add spinach leaves to pan with another 1 tbsp of olive oil and additional salt and pepper, if desired, and cook just until spinach leaves start to wilt.
Transfer veggie mix to bowl and set aside for use later.
In a large sauce pan, combine salsa verde and chicken broth, cooking for approximately 10 minutes or until sauce reduces by a third.
Add sour cream and cilantro to sauce pan and simmer for another 5 minutes to bring flavors together.
In a 9x13 pan, put a thin layer of sauce on bottom of pan, then add two tortillas on top of sauce, ⅓ of veggie mix, ⅓ of Monterey Jack cheese, and additional sauce. Repeat in three alternating layers, ending with a fourth layer of just tortilla, sauce and cheese on top.
Bake in 350 degree oven or until cheese starts to brown and sauce is bubbling.
Broil for 1-2 minutes to further brown top layer of cheese, if so desired. Watch broiler closely to avoid overcooking!
Allow to cool for 5 minutes before cutting and serving.
Recipe by Pretty Healthy House at http://www.prettyhealthyhouse.com/veggie-green-chile-enchiladas/