In a large mixing bowl, toss chicken, onion, cumin and cream cheese together. Mix well.
Grease the bottom and the sides of a 4- or 6-quart slow cooker with nonstick spray or a little cooking oil. Pour some enchilada sauce on the bottom (about 1/2 cup).
Place two tortillas at the bottom of the pot, covering most of the bottom part. Spread 1/3 chicken mixture on top of the tortillas; pour a little enchilada sauce on top of the chicken; sprinkle some cheddar cheese on top of the sauce.
Repeat the layers until you run out of the chicken mixture. You should still have some cheese and sauce left.
Finish the layers by topping with two tortillas, then pour the remaining enchilada sauce over. Cover and cook on high for 4 hours.
When the enchiladas are done, turn off the slow cooker. Uncover, sprinkle the remaining cheese on top and cover again until the cheese melts.
Cut into wedges. Garnish with cilantro leaves and serve with pico de gallo and sour cream.
Notes
This recipe can be made gluten-free by using corn tortillas.