Rub the lamb generously with salt.
Spread the surface of the lamb with grape seed oil (young lamb has little natural fat).
Add ½ cup water to a roasting pan and place the lamb inside.
Roast in a hot oven at 400°F (200°C) for about 30 minutes, basting frequently.
Reduce the heat to 375°F (190°C) and continue roasting, basting often.
Add additional water if the pan begins to scorch.
Total roasting time is approximately 3 hours for a full baron, or 2–2½ hours for a demi-baron.