Preheat oven to 375°F (190°C).
Prepare Chicken:
In a skillet, heat olive oil over medium heat. Add shredded chicken and season with cumin, chili powder, garlic powder, salt, and pepper. Stir in taco sauce and cook until heated through, about 5 minutes.
Assemble Tacos:
Place tortillas in a foil pan, slightly overlapping if needed. Spoon the seasoned chicken evenly over the tortillas. Sprinkle shredded cheese on top. If using, add chopped onions and black olives.
Bake:
Place the pan in the preheated oven and bake for 10–15 minutes, or until the cheese is melted and bubbly.
Garnish and Serve:
Remove from oven and let cool for a few minutes. Garnish with fresh cilantro. Serve with sour cream and salsa on the side.
