01 - In a large bowl, thoroughly mix the shredded chicken with half of the cheddar cheese, diced onions, sour cream, cumin, salt, and pepper.
02 - Spread a few spoonfuls of enchilada sauce evenly on the bottom of a large baking dish.
03 - Spoon the chicken filling mixture onto each flour tortilla, roll tightly, and position seam-side down in the baking dish.
04 - Pour the remaining enchilada sauce over the arranged tortillas and sprinkle with the remaining cheddar cheese.
05 - Cover the dish securely with aluminum foil and place in the freezer until ready to bake.
06 - Preheat oven to 375°F (190°C). Bake the enchiladas covered for 30-40 minutes, then remove foil and bake an additional 10 minutes until the cheese is melted and sauce is bubbling.
07 - Remove from oven and scatter fresh cilantro over the enchiladas just before serving.