Step 1: Prep the Roast
Preheat oven to 325°F (convection) or 350°F (conventional).
Pat roast dry and rub all over with oil, salt, and pepper.
Place in roasting pan rib ends up, cavity filled with foil or parchment ball to maintain shape.
Step 2: Slow Roast
Roast uncovered for 1½ to 2 hours, until internal temperature reaches 125°F at the thickest part (for medium doneness).
Remove from oven to apply crust.
Step 3: Make the Crust
In a bowl, mix chopped nuts, herbs, allspice, garlic powder, Dijon, sweetener (if using), almond flour, and softened butter.
You should have a thick, sticky paste.
Step 4: Apply Crust & Finish Roast
Press the crust mixture all over the top and outer sides of the roast.
Return to oven and increase heat to 425°F for 10–15 minutes, until crust is golden and internal temperature reaches 135–140°F.
Remove and rest 20–30 minutes loosely covered — carryover cooking will bring it to ~145°F.
🎯 If you prefer a lamb crown roast, reduce cooking time and aim for ~125–130°F final temp for medium-rare.