Prepare the oven and tray: Preheat the oven to 180°C fan-forced / 200°C conventional / 400°F. Have a large baking tray ready, big enough to fit the lamb comfortably.
Layer the foil and baking paper: On a clean bench, lay out two long pieces of foil in a cross shape. Then, layer two long pieces of baking paper over the foil, also in a cross shape. This will form the base to wrap your lamb parcel. Place the lamb in the center where the layers overlap.
Prepare the lamb and marinade: Pat the lamb dry with paper towel. Using a sharp knife, make 6–8 small incisions on the top side of the lamb. In a bowl, combine the fresh herbs, spices, and lemon juice to form a paste. Rub the mixture all over the lamb, pressing it into the cuts to help the flavours infuse.
Wrap and roast: Fold the baking paper over the lamb to enclose it, then wrap tightly with the foil to form a sealed parcel. Transfer to the baking tray and roast for 4 hours. Once the lamb is roasted, squeeze the juice of half a lemon over the lamb, then serve immediately.
Optional crispy top: If you prefer a crispy top on your lamb, after 4 hours, carefully open the foil and baking paper to expose the top. Place the lamb back in the oven for a further 10 minutes to allow the surface to brown and crisp up. Otherwise, you can skip this step, as I personally don’t do it.
