If you would like a roast but do something interesting with the meat joint try Kleftiko, a Greek dish.
Take a leg or shoulder of lamb (or half leg/shoulder). Make slits in the top and push in slivers of garlic.
Put a little olive oil and lemon juice in a bowl. Add some dried oregano and rub the mixture into the top of the lamb.
Wrap the whole lot in two layers of foil, stand in a roasting tin and bake in a low/medium (about 150C) oven for about 5 hours. The lamb will taste lovely and garlicky and will be so tender that you can separate it with two forks, in the same way as cooked fish. The more garlic the better.
This is also nice with red onion and butternut squash pilaf.
Just put it in the oven and forget about it.