In a saucepan, melt the butter over medium heat, then add the onion slices.
Saute until brown and caramelized, about 5 minutes. Add the chicken to the pan, stirring it to mix with the caramelized onions, then remove from the heat. In a large bowl, whisk together the pumpkin, cream, broth, cinnamon, nutmeg, cumin, salt and pepper.
Spoon chicken mixture into the tortilla's, rolling them tightly and placing in a medium-sized baking dish.
Once all enchiladas have been rolled, spread the pumpkin cream sauce over the top.
Sprinkle generously with Queso Fresco, then bake in an oven preheated to 425 degrees for 20-25 minutes, or just until the tips of the cheese begins to brown.
Garnish with diced scallions before serving.
Enjoy!