For each 5–7 lb leg of lamb: 6–8 cloves garlic, sliced 2–3 tbsp fresh rosemary, chopped 1 tbsp fresh thyme (optional) Zest of 1 lemon 2 tbsp Dijon mustard (optional, but adds great flavor) 3 tbsp olive oil 2 tsp kosher salt 1 tsp black pepper 1. Prep Remove the lamb from the refrigerator about 1 hour before cooking. Pat dry with paper towels. Use a small knife to make about 15–20 small slits all over the meat. Tuck a slice of garlic into each slit. Mix the rosemary, thyme, le