Preheat oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Slice the zucchini into half-moons and chop the red bell pepper into 1-inch pieces.
Place the chicken breasts, zucchini, bell pepper, and cherry tomatoes onto the prepared baking sheet.
In a small bowl, whisk together the olive oil, minced garlic, chopped rosemary, and thyme.
Drizzle the herb oil over the chicken and vegetables, then season everything with sea salt and black pepper.
Toss the vegetables to coat and flip the chicken to ensure it is fully seasoned.
Arrange lemon slices on top of the chicken and scattered among the vegetables.
Roast for 20-25 minutes 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 and serving with the roasted vegetables.