01 - Set oven temperature to 400°F.
02 - Pat rack of lamb dry with paper towels. Season thoroughly with salt and black pepper.
03 - Heat 1 tablespoon olive oil in ovenproof skillet over medium-high heat. Sear lamb fat side down for 2–3 minutes until browned. Flip and sear 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.
05 - Brush seared lamb evenly with the mustard-herb mixture, pressing gently to ensure it adheres.
06 - Transfer skillet to preheated oven. Roast for 15–20 minutes for medium-rare doneness (internal temperature 130–135°F) or until preferred doneness.
07 - Remove lamb from oven and loosely tent with foil. Let rest for 10 minutes before slicing into individual chops.
08 - Garnish with lemon wedges and extra herbs if desired. Serve immediately.