Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Pat the chicken breast dry with a paper towel and season both sides evenly with the sea salt and black pepper.
In a small mixing bowl, whisk together the olive oil, minced garlic, chopped rosemary, and chopped thyme.
Place the chicken breast, trimmed asparagus spears, and cherry tomatoes in a single layer on the prepared baking sheet.
Drizzle the herb and garlic oil mixture over the chicken and vegetables, tossing the vegetables gently to ensure they are well coated.
Slice half of the lemon into thin rounds and place them directly on top of the chicken; squeeze the juice from the remaining lemon half over the vegetables.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure the meat remains succulent and juicy.