01 - Preheat your oven to 400°F for optimal roasting temperature.
02 - Pat the lamb rack thoroughly dry with paper towels. Season generously on all sides with salt and freshly ground black pepper.
03 - Heat 1 tbsp olive oil in a heavy, oven-safe skillet over medium-high heat. Sear the lamb rack for 2-3 minutes on each side until a rich brown crust forms. Remove from heat and set aside briefly.
04 - In a mixing bowl, combine the chopped parsley, rosemary, thyme, minced garlic, breadcrumbs, Parmesan cheese (if using), and 2 tbsp olive oil. Mix thoroughly to create a moist, cohesive crumb mixture.
05 - Brush the seared lamb rack with Dijon mustard on the meat side, ensuring even coverage to help the crust adhere.
06 - Press the herb mixture firmly and evenly onto the mustard-coated surface, creating a uniform crust layer.
07 - Return the lamb rack to the skillet, herb-crust side up. Place in the preheated oven and roast for 15-18 minutes for medium-rare (internal temperature 130-135°F), adjusting time to your preferred doneness.
08 - Remove from the oven and tent loosely with aluminum foil. Allow the lamb to rest for 10 minutes to redistribute juices before carving.
09 - Slice the rested lamb rack into individual chops between the ribs. Serve immediately while hot.