Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Cut the chicken breast into uniform 1-inch cubes and chop the broccoli, bell peppers, and carrots into bite-sized pieces.
Finely mince the garlic cloves and place them in a large mixing bowl.
Add the olive oil, dried oregano, dried thyme, sea salt, and black pepper to the bowl with the garlic and whisk to combine.
Toss the chicken cubes and chopped vegetables into the bowl, stirring until every piece is thoroughly coated in the herb oil.
Spread the chicken and vegetable mixture in a single layer on the prepared baking sheet, ensuring they are not overcrowded to allow for proper roasting.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken is cooked through and the vegetables are tender and slightly caramelized at the edges.
Remove from the oven and let rest for 2 minutes before serving hot.