Heat a cast iron skillet over medium-high heat. Once hot, add the chilis to the dry skillet. Toast, stirring often until fragrant and lightly charred, but not burnt. Place the chilis in a large heat-proof bowl.
4 dried guajillo chiles, 2 dried ancho chiles, 1 arbol chile
Pour the hot chicken broth over the chiles. Cover and let them soak for 20 minutes to soften.
4 cups low-sodium chicken broth
Once softened, add the chiles, along with the 1½ cups of the soaking liquid, garlic, chocolate, salt, and oregano to a blender. Blend until completely smooth.
1 clove garlic, 1 tablespoon semisweet chocolate chips, 1 teaspoon kosher salt, ½ teaspoon dried oregano
Preheat the oven to 350°F.
In a 9x13-inch baking pan, add enough enchilada sauce to coat the bottom. Spread it out into an even layer.
In a large bowl, mix together the cooked shredded chicken and enough enchilada sauce to lightly moisten the chicken.
2 cups shredded cooked chicken
Warm the corn tortillas in the microwave for 30-60 seconds, until pliable.
8 large yellow corn tortillas
Grab a tortilla, add some of the chicken filling down the center and top with cotija. Roll and place seam side down in the baking dish. Repeat with the remaining tortillas and filling.
1 cup crumbled cotija cheese
Top with the remaining enchilada sauce and sprinkle on the monterey jack cheese.
1 cup shredded monterey jack cheese
Bake for 20 minutes until the cheese is melted and the sauce is bubbling around the edges.
Garnish with the lettuce, radish, onion, avocado and cotija before serving.
1 cup shredded lettuce, 2 radishes, 2 tablespoons diced red onion, 1 avocado, ½ cup crumbled cotija cheese