01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or foil.
02 - Pat the lamb rack dry and trim excess fat if needed. Season all sides generously with salt and pepper.
03 - Heat 1 tbsp olive oil in a large skillet over medium-high heat. Sear the lamb rack, fat side down first, until browned on all sides (about 2-3 minutes per side). Remove from heat and let cool slightly.
04 - In a medium bowl, combine breadcrumbs, parsley, rosemary, thyme, garlic, Parmesan, lemon zest, a pinch of salt and pepper, and 2 tbsp olive oil. Mix well to evenly moisten the crumbs.
05 - Brush the cooled lamb rack with Dijon mustard on the meaty side.
06 - Press the herb breadcrumb mixture firmly onto the mustard-coated side of the lamb to create an even crust.
07 - Place the lamb rack, crust side up, on the prepared baking sheet. Roast in the preheated oven for 18-22 minutes for medium-rare (internal temperature should reach 135°F), or longer for desired doneness.
08 - Remove from oven, tent with foil, and rest for 10 minutes before slicing into individual chops. Serve immediately, garnished with extra herbs if desired.