Preheat the oven to 375°F and lightly grease a 9x13 baking dish.
In a bowl, toss the chicken with olive oil, fajita seasoning, garlic powder, onion powder, salt, and black pepper.
Spread the rice in the baking dish, then spoon the salsa and sour cream over the top.
Add the seasoned chicken, then layer on the sliced peppers and onion.
Top with cheese, cover with foil, and bake for 25 minutes.
Remove the foil and bake for 10 more minutes until the cheese is melted and the chicken is cooked through.
Rest briefly, then finish with cilantro and serve warm.