Preheat your oven to 375°F (190°C).
Heat the enchilada sauce in a saucepan over medium heat.
In a bowl, mix shredded chicken, diced onions, cumin, garlic powder, salt, and pepper.
Warm the tortillas in the microwave for 30 seconds to soften.
Spread a spoonful of green sauce on each tortilla.
Fill each tortilla with the chicken mixture and roll tightly.
Place the rolled tortillas seam-side down in a baking dish.
Pour remaining green sauce over the enchiladas.
Sprinkle shredded cheese on top.
Bake for 20-25 minutes until bubbly and golden.