Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the chicken breast, broccoli florets, and red bell pepper into uniform one-inch pieces to ensure even cooking.
In a mixing bowl, toss the chicken and vegetables with 0.25 tablespoons of olive oil, garlic powder, sea salt, and black pepper.
Spread the chicken and vegetable mixture in a single layer on the prepared baking sheet and roast for 18 to 20 minutes.
While the chicken roasts, combine the dry basmati rice and water in a small saucepan and bring to a gentle boil.
Reduce the heat to low, cover the pot, and simmer for 12 minutes until the water is fully absorbed.
Remove the rice from the heat and let it rest for 5 minutes before fluffing with a fork and stirring in the remaining olive oil, lemon juice, lemon zest, and chopped parsley.
Portion the zesty herb rice onto a plate and top it with the roasted chicken and vegetables.