Preheat your outdoor grill or indoor grill pan to medium-high heat and preheat the oven to 400°F.
Finely mince the fresh rosemary, thyme, and garlic clove.
In a small bowl, whisk together half of the olive oil, the minced herbs, garlic, sea salt, and black pepper.
Rub the herb mixture evenly over all sides of the lamb loin chops and let them marinate at room temperature for 10 minutes.
Trim the woody ends off the asparagus and toss the spears with the remaining olive oil and a pinch of salt on a parchment-lined baking sheet.
Roast the asparagus in the oven for 12-15 minutes until tender and slightly charred at the tips.
While the asparagus roasts, place the lamb chops on the hot grill and cook for 4-5 minutes per side for medium-rare (internal temperature of 145°F).
Remove the lamb from the grill and let it rest for 5 minutes to allow the juices to redistribute.
Garnish the lamb and roasted asparagus with fresh lemon zest before serving.