Preheat your oven to 425°F.
Trim the asparagus and halve the cherry tomatoes; set aside.
In a small bowl, whisk together olive oil, lemon juice, minced garlic, fresh thyme, fresh rosemary, salt, and pepper.
Place the chicken breast on a sheet pan and brush generously with the lemon herb mixture.
Arrange the asparagus and cherry tomatoes around the chicken, drizzling any remaining herb mixture over the vegetables.
Roast in the oven for 20-25 minutes, or until the chicken is cooked through and the vegetables are tender.
For extra browning and flavor, broil the sheet pan for an additional 2-3 minutes if desired.
Remove from the oven, let it rest for a few minutes, then serve.