01 - Set the oven to 400°F to prepare for roasting.
02 - Pat the rack of lamb dry, then season evenly with salt and freshly ground black pepper.
03 - Heat 1 tablespoon olive oil in an ovenproof skillet over medium-high heat. Sear the lamb fat side down for 2–3 minutes until browned, then flip and sear the opposite side for 1–2 minutes. Remove from heat.
04 - Combine Dijon mustard, remaining olive oil, minced garlic, rosemary, parsley, thyme, and lemon zest in a small bowl to form the herb crust.
05 - Brush the mustard-herb mixture thoroughly over the seared lamb, pressing gently to adhere.
06 - Place the skillet in the oven and roast the lamb for 15–20 minutes for medium-rare (internal temperature 130–135°F), or adjust time to preferred doneness.
07 - Remove lamb from oven, tent with foil, and let rest for 10 minutes before slicing into chops.
08 - Optional: Garnish with lemon wedges and additional chopped herbs prior to serving.