01 - Preheat oven to 425°F. Line a large rimmed baking sheet with parchment paper for easy cleanup.
02 - In a large bowl, whisk together olive oil, lime juice, chili powder, cumin, smoked paprika, garlic powder, onion powder, oregano, salt, and pepper until well combined.
03 - Add the sliced chicken, bell peppers, and onion to the bowl. Toss until all ingredients are evenly coated with the marinade.
04 - Spread the mixture evenly on the prepared sheet pan, ensuring the chicken and vegetables are arranged in a single layer for even roasting.
05 - Bake for 20-25 minutes, stirring halfway through, until the chicken is cooked through and vegetables are tender with slightly charred edges.
06 - Remove from oven, give everything a quick toss, and serve immediately with warm tortillas and your choice of toppings: avocado, cilantro, sour cream, and fresh lime wedges.