Preheat your oven to 375°F and lightly grease a small baking dish.
In a small saucepan over medium heat, whisk together the avocado oil, ancho chili powder, garlic powder, onion powder, cumin, sea salt, and tomato puree.
Bring the sauce to a gentle simmer for 3 minutes until fragrant, then remove from heat.
Shred the cooked chicken breast and toss it in a bowl with 2 tablespoons of the prepared ancho sauce.
Warm the corn tortillas in a dry skillet for 30 seconds per side until they are soft and pliable.
Place a portion of the chicken mixture into each tortilla, roll them up tightly, and place them seam-side down in the baking dish.
Pour the remaining ancho chili sauce over the top of the tortillas and sprinkle evenly with the shredded cheddar cheese.
Bake for 15 minutes until the sauce is bubbling and the cheese has melted.
Garnish with fresh chopped cilantro before serving.