- 1 1/2 cups fine fresh bread crumbs
- 3 tablespoons finely chopped fresh flat-leaf parsley
- 1 tablespoon finely chopped fresh mint
- 1 1/2 teaspoons minced fresh rosemary
- 1/2 teaspoon salt
- 1/4 teaspoon black pepper
- 3 1/2 tablespoons olive oil
- 3 racks racks lamb, frenched, trimmed of all but a thin layer of fat, then brought to room temperature
- 2 tablespoons Dijon mustard
- Special equipment: an instant-read thermometer
- Stir together bread crumbs, parsley, mint, rosemary, salt, and pepper in a bowl, then drizzle with 2 1/2 tablespoons oil and toss until combined well.
- Put oven rack in middle position and preheat to 400 degrees F.
- Season lamb with salt and pepper. Heat remaining tablespoon oil in a large heavy skillet over moderately high heat until hot but not smoking, then brown lamb 1 rack at a time, turning once, about 4 minutes per rack. Transfer to a 13- by 9- by 2-inch roasting pan, arranging fatty sides up.
- Spread fatty sides of each rack with 2 teaspoons mustard. Divide bread crumb mixture into 3 portions and pat each portion over mustard coating on each rack, gently pressing to adhere.
- Roast lamb until thermometer inserted diagonally 2 inches into center (do not touch bone) registers 130 degrees F (for medium-rare), 20 to 25 minutes, and transfer to a cutting board. Let stand 10 minutes, then cut into chops.