To make the sauce, place the chilies in a saucepan and cover with water.
Bring to a simmer and cook until tender, about 5 minutes.
Drain, reserving the liquid.
Stem and seed the chilies and place them in a blender with the tomatoes, sesame seeds, oregano, cloves, allspice, cinnamon, garlic, banana, chocolate and salt, plus 1/2 cup of the reserved cooking liquid.
Blend until smooth.
Scrape the mixture into a saucepan, stir in 1/2 cup water and simmer for 5 minutes.
Keep warm.
To make the enchiladas, preheat oven to 350 degrees.
Steam the tortillas until hot and pliable.
Place each tortilla on a work surface and arrange 1/4 cup of the turkey in a line down the center.
Top with 1/2 tablespoon of the onion and 1 tablespoon of the cheese.
Roll up and place seam side down in a shallow baking dish.
Repeat.
Spoon sauce over the tortillas and bake until heated through, about 15 minutes.