Preheat your oven to 350ºF. In a mixing bowl, combine the shredded chicken with ¼ cup of the enchilada sauce. Add salt and pepper to taste, and stir until well mixed.
Wrap the corn tortillas in a damp paper towel and microwave for about 1 minute, flipping halfway through. If they're not yet warm and flexible, heat them for an additional 15 seconds.
Lay out the warmed tortillas and distribute the chicken mixture and 1 cup of cheese evenly among them. Roll each tortilla tightly and place them seam-side-down in a high-rimmed baking dish.
Pour the remaining enchilada sauce over the rolled tortillas and sprinkle the rest of the cheese on top.
Bake in the preheated oven for 20 minutes, or until the cheese is melted and the sauce is bubbling. Serve hot, garnished with any of the optional toppings as desired.