Preheat your oven to 375 degrees Fahrenheit and lightly grease a small baking dish.
In a small saucepan over medium heat, combine the tomato puree, chili powder, cumin, garlic powder, and onion powder with a splash of water. Simmer for 5 minutes until the flavors meld.
Heat the olive oil in a skillet over medium heat and sauté the diced white onion until translucent, about 3 minutes.
Add the pre-cooked shredded chicken breast to the skillet, season with sea salt and black pepper, and toss with 2 tablespoons of the prepared red chili sauce to moisten.
Warm the corn tortillas in a dry pan or microwave for 10 seconds until pliable.
Dip each tortilla into the sauce to coat, then fill with the chicken mixture and roll tightly.
Place the enchiladas seam-side down in the baking dish, pour the remaining sauce over the top, and sprinkle with the shredded cheddar cheese.
Bake for 10 to 12 minutes until the cheese is melted and bubbly.
Garnish with fresh cilantro before serving.