Preheat your oven to 375°F (190°C).
Cut the chicken breast into 1-inch bite-sized cubes.
Steam the broccoli, sliced carrots, and cauliflower florets for 3-4 minutes until slightly softened but still crisp.
In a small mixing bowl, whisk together the Greek yogurt, olive oil, garlic powder, onion powder, sea salt, and black pepper to create the creamy base.
In a medium-sized baking dish, combine the cubed chicken, steamed vegetables, and cooked brown rice.
Pour the yogurt mixture over the chicken and vegetables, tossing gently until everything is evenly coated.
Spread the mixture flat in the dish and sprinkle the shredded parmesan cheese over the top.
Bake for 25 to 30 minutes, or until the chicken is fully cooked and the top is lightly golden and bubbling.