Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Wash and dice the red potatoes into 1-inch cubes, and trim the woody ends off the asparagus spears.
Finely mince the garlic cloves and strip the leaves from the rosemary and thyme sprigs, chopping them finely.
In a large mixing bowl, combine the chicken breast, cubed potatoes, and asparagus.
Drizzle the olive oil over the mixture and add the minced garlic, chopped herbs, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated in the oil and seasonings.
Spread the ingredients in a single layer on the prepared baking sheet, ensuring they aren't overcrowded so they roast properly.
Bake for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender.
Remove from the oven and immediately drizzle with fresh lemon juice to brighten the flavors before serving.