Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into even 1-inch cubes and slice the carrots and bell peppers into bite-sized pieces.
In a large mixing bowl, combine the chicken, broccoli, carrots, and bell peppers.
Add the olive oil, minced garlic, rosemary, thyme, sea salt, and black pepper to the bowl, tossing thoroughly to ensure everything is evenly coated.
Spread the chicken and vegetable mixture across the prepared baking sheet in a single layer to ensure even roasting.
Bake for 18 to 22 minutes, or until the chicken is cooked through and the vegetables are tender with slightly caramelized edges.
Remove from the oven and let rest for 2 minutes before serving warm.