Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Pat the chicken breast dry with a paper towel and slice it into even, bite-sized pieces to ensure uniform cooking.
In a large mixing bowl, combine the chicken, broccoli florets, zucchini slices, and carrots.
Drizzle the olive oil and fresh lemon juice over the chicken and vegetables, then add the minced rosemary, thyme, and garlic.
Season the mixture with sea salt and black pepper, tossing thoroughly to ensure every piece is well-coated.
Spread the mixture in a single layer on the prepared sheet pan, ensuring the pieces are not crowded so they roast rather than steam.
Roast in the oven for 18 to 22 minutes, or until the chicken is cooked through and the vegetables are tender with lightly charred edges.
Remove from the oven and serve immediately, drizzling any remaining pan juices over the dish for a burst of citrus flavor.