Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Chop the sweet potato into small cubes and slice the carrots and zucchini into rounds.
In a small bowl, whisk together the olive oil, lemon juice, minced garlic, rosemary, thyme, sea salt, and black pepper.
Place the chicken breast and all the chopped vegetables into a large mixing bowl.
Pour the herb and oil mixture over the chicken and vegetables, tossing thoroughly to ensure everything is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the chicken is not covered by vegetables.
Roast in the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender and lightly browned.
Remove from the oven and let the chicken rest for 5 minutes before slicing and serving alongside the roasted vegetables.