Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with a paper towel and cut it into 1-inch bite-sized cubes.
Prepare the vegetables by chopping the broccoli into small florets and slicing the red bell pepper into 1-inch pieces.
In a large mixing bowl, whisk together the extra virgin olive oil, minced garlic, dried thyme, dried rosemary, sea salt, and black pepper.
Add the chicken cubes, broccoli florets, and bell pepper pieces to the bowl, tossing thoroughly until everything is evenly coated in the herb oil.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the pieces are not crowded so they roast rather than steam.
Roast in the center of the oven for 18 to 22 minutes, or until the chicken is cooked through and the vegetables are tender with slightly charred edges.
Remove from the oven and let the chicken rest on the pan for 2 minutes before serving to ensure it stays juicy.