Preheat the oven to 400ºF.
Heat avocado in an oven-safe large skillet over medium/high heat. Add the onion when the oil is fragrant and season with ¼ teaspoon of salt. Saute for 3-4 minutes.
Add garlic to the onion and saute for an additional minute.
Turn heat to medium and add the chicken, black beans, and corn to the skillet and stir all of the ingredients together.
Prepare the sauce. Add the enchilada sauce, salsa, cumin, chili powder, paprika, and hot sauce to a bowl and whisk the ingredients together until combined. Pour the sauce into the skillet. Bring the mixture to a gentle simmer.
Next, fold the tortillas into the mixture so they are completely submerged in the enchilada sauce.
Top with cheese, transfer the skillet to the oven, and bake for 15-20 minutes or until the cheese has melted and the sauce is bubbling over the sides.
Remove from the oven and let it rest for 5-10 minutes. Top with optional toppings.