Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Cut the chicken breast and sweet potato into 1-inch cubes, and chop the broccoli, bell pepper, and red onion into bite-sized pieces.
In a large mixing bowl, combine the chicken and all the vegetables.
Add the olive oil, minced garlic, dried oregano, dried thyme, sea salt, and black pepper to the bowl.
Toss everything together until the chicken and vegetables are evenly coated with the oil and seasonings.
Spread the mixture in a single layer on the prepared baking sheet, ensuring space between pieces for even roasting.
Roast in the oven for 20-25 minutes, or until the chicken is cooked through and the vegetables are tender and slightly caramelized.
Remove from the oven and let rest for 2-3 minutes before serving warm.