Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with a paper towel to ensure the surface gets crispy, then slice the zucchini and bell peppers into bite-sized pieces.
In a large bowl, toss the broccoli florets, zucchini, and bell peppers with half of the olive oil, sea salt, and black pepper.
Rub the remaining olive oil over the chicken breast and season both sides evenly with the garlic powder, dried rosemary, and dried thyme.
Place the chicken and vegetables in a single layer on the prepared baking sheet, ensuring they are not overcrowded to allow for even browning.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and slightly charred.
Let the chicken rest for 5 minutes before slicing to keep it juicy, then serve immediately with the roasted vegetables.