Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Slice the chicken breast into thin strips and slice the bell peppers and red onion into similar-sized ribbons to ensure even cooking.
Place the chicken and vegetables onto the prepared sheet pan and drizzle with the extra virgin olive oil.
Sprinkle the chili powder, ground cumin, garlic powder, sea salt, and black pepper over the ingredients and toss thoroughly to coat.
Spread the mixture into a single layer, ensuring the chicken is not overcrowded so it can brown properly.
Roast in the oven for 15 to 20 minutes until the chicken is cooked through and the vegetables are tender with slightly charred edges.
While the fajitas roast, warm the corn tortillas in a dry skillet over medium heat for 30 seconds per side until pliable.
Remove the pan from the oven, squeeze fresh lime juice over everything, and garnish with chopped cilantro before serving in the warm tortillas.