Preheat oven to 350 degrees F.
Combine your cooked chicken, Monterey Jack cheese, green onions, and cilantro until everything is nicely blended together.
Put your tortillas on a plate and cover with a damp paper towel. Zap them in the microwave for 30 seconds on high. Spread one-fourth cup of enchilada sauce across the bottom of a 9 x 13-inch baking dish.
Lay a tortilla out on a flat surface. Put ⅓ cup of the chicken mixture & cheese in the center of it then roll it up. Place the rolled-up tortilla with the seam side down in your baking dish. Continue doing this with all of your remaining tortillas and filling.
Pour the rest of the enchilada sauce over the tortillas, making sure each one is completely covered. Sprinkle with the leftover cheese on top.
Pop your dish in the oven for 25 minutes until it's hot and bubbly. Serve it with a side of homemade salsa verde, sour cream, and extra chopped cilantro for added flavor.