Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Halve the baby potatoes and trim the woody ends off the asparagus spears.
In a small bowl, whisk together the extra virgin olive oil, minced garlic, chopped rosemary, thyme, sea salt, and black pepper.
Place the chicken breast, potatoes, and asparagus on the prepared sheet pan, then drizzle the herb oil mixture over everything, tossing the vegetables to coat.
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 oven for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender.
Add the cherry tomatoes to the pan during the final 5 minutes of roasting until they are just beginning to burst and soften.