Preheat the oven to 400°F (200°C) and lightly spray a baking dish with cooking spray.
In the prepared baking dish, combine the chicken pieces, olive oil, taco seasoning, garlic powder, salt, and pepper. Stir everything together, ensuring the chicken is evenly coated, then spread it out in a single layer. Set aside.
In a medium bowl, mix together the tomatoes, jalapeños, onion, cilantro, garlic, and lime juice. Spoon this salsa mixture evenly over the chicken.
Top the salsa with shredded cheese, then bake uncovered for 30 minutes.
Once done, remove from the oven, sprinkle with extra cilantro for garnish, and serve with your favorite side dishes.