Prep the lamb: Remove the lamb from the fridge at least an hour or two before cooking. Don't forget to remove any packaging, it should be free of packaging when reaching room temp.
Preheat the slow cooker: Pour a cup of water into the slow cooker and set it to HIGH to preheat while you do your prep.
Dry the lamb: Pat the lamb dry using kitchen paper towels. Turn it over and dry all round before seasoning.
Season + oil: Season generously with salt and pepper, drizzle the lamb with olive oil and gently pat/rub the seasoning and oil into the lamb.
Cook the lamb: Toss the water out, add the required amount of water for this recipe, place the lamb into the slower cooker and reduce the setting to LOW and cook for 7 hours.
Half hour before the time is up you can preheat the oven to 200C/400F and place the rack lower down in the oven. This browning / roasting the lamb step is completely optional since the lamb is ready to be served after slow cooking.
Remove the lamb from the slower cooker and place it on an oven tray and roast for 15 minutes. Please check since ovens are different and take it out once its browned.
Remove from oven or from the slow cooker (if not doing the oven step) rest the lamb on a platter, loosely covered with foil for 20 minutes.
Serve with forks and gravy if using.