Preheat oven to 375°F and lightly grease a small baking dish with the olive oil.
In a small saucepan, combine the tomato puree, chili powder, cumin, garlic powder, onion powder, sea salt, and black pepper.
Simmer the sauce over medium-low heat for 5 minutes until the flavors meld into a rich consistency.
Poach the chicken breast in simmering water for 12 minutes until cooked through, then shred finely with two forks.
Mix the shredded chicken with 2 tablespoons of the prepared red chili sauce to keep it moist.
Soften the corn tortillas in a warm skillet for 30 seconds per side until they are pliable enough to roll.
Fill each tortilla with the chicken mixture, roll tightly, and place seam-side down in the baking dish.
Top with the remaining sauce and bake for 15 minutes until the sauce is bubbling.
Garnish with a dollop of Greek yogurt, minced red onion, and fresh cilantro before serving.