Preheat oven to 400º
Mix chicken with 3/4 cup salsa verde, 1 1/2 cups of the cheese, 1/4 cup of the cilantro.
Spread 1 cup of the salsa verde over the bottom of a 9x13 baking dish.
Microwave tortillas on high power for 45 seconds.
Working one at a time, spoon approx. 1/4 cup of the chicken filling into a tortilla. Roll into cylinder and place, seam down, into baking dish.
Drizzle enchiladas evenly with 1 1/2 cups of the salsa and sprinkle with remaining cheese.
Lightly spray a sheet of foil with cooking spray, cover dish and bake approx. 30 minutes.
Remove foil, sprinkle with onion (optional) and remaining cilantro. Serve with guacamole and sour cream (optional).