Preheat your oven to 375°F.
Pour the rice into the bottom of a baking dish and add the water, stirring to combine.
Slice the bell peppers and onions into thin strips.
Cut the chicken breasts into approximately 4 pieces each to help them cook evenly.
In a large mixing bowl, combine the chicken, bell peppers, and onions.
In a small bowl, mix all the spices together, then sprinkle evenly over the chicken and vegetables.
Use your hands to toss the chicken, peppers, and onions in the spice blend until everything is well-coated.
Layer the seasoned chicken and vegetables on top of the rice in the baking dish.
Cover the dish tightly with foil and bake for 1 hour.
Remove the foil, garnish with fresh cilantro, and serve warm.