Take the lamb out of the fridge at least 30 minutes before cooking. Cold meat straight into a hot oven = uneven cooking. Nobody wants that.
Preheat your oven to 425°F (220°C). This high heat will give you that beautiful crust without overcooking the inside.
Trim excess fat if needed. A little fat is good for flavor, but you don't want a grease fire. Most butchers do a decent job of trimming, so you might not need to do much.
In a small bowl, mix the olive oil, garlic, rosemary, thyme, Dijon mustard, salt, pepper, and lemon zest to form a paste. If using breadcrumbs, add them too.
Rub the lamb all over with the herb mixture, focusing particularly on the meaty parts. Don't worry about the bones – they make a nice handle for your "meat lollipops" later.
Place the rack bone-side down on your roasting pan or baking sheet. The bones create a natural roasting rack – how convenient!
Roast for 20-25 minutes for medium-rare. The exact time depends on the size of your rack and how you like your meat cooked. This is why a meat thermometer is your best friend: 125°F for rare, 135°F for medium-rare, 145°F for medium.
Remove from the oven and cover loosely with foil. Let it rest for 10 minutes. I know you're hungry, but this step is crucial—it allows the juices to redistribute instead of spilling all over your cutting board.
Carve between the bones to serve individual chops. Admire your work briefly, then devour.