Preheat your oven to 425°F (220°C).
Cut the sweet potato into 1/2-inch cubes and trim the woody ends from the asparagus.
In a small bowl, whisk together olive oil, lemon juice, minced garlic, chopped fresh herbs, salt, and pepper.
Place the chicken breast, sweet potato cubes, and asparagus on a sheet pan. Drizzle the prepared lemon-herb mixture over everything, ensuring even coating.
Spread the ingredients in a single layer to ensure even roasting.
Roast in the preheated oven for 20-25 minutes, or until the chicken is fully cooked (internal temperature of 165°F), the sweet potatoes are tender, and the asparagus is crisp-tender.
Remove from the oven, let rest for a few minutes, and serve warm.