Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Snap the woody ends off the asparagus spears and place them on the prepared baking sheet.
Drizzle the asparagus with half of the olive oil and season with half of the sea salt and black pepper.
Zest the lemon and then squeeze the juice into a small bowl, discarding any seeds.
Finely mince the garlic cloves, fresh rosemary, and fresh thyme.
Season the chicken breast on both sides with the remaining sea salt, black pepper, and half of the minced herbs and garlic.
Heat the remaining olive oil in a large oven-safe skillet over medium-high heat.
Place the chicken in the skillet and sear for 3-4 minutes until a deep golden-brown crust forms, then flip.
Pour the lemon juice and zest over the chicken, sprinkle with the remaining herbs, and transfer the skillet and the asparagus tray to the oven.
Roast for 8-10 minutes until the chicken reaches an internal temperature of 165°F and the asparagus is tender and slightly charred.