500g-700g lamb (leg, shoulder, etc.) with the bone
A slice of butter, kneaded with rosemary and whole black peppercorns
Half a bottle of red wine (Greek or south Italian, for a fruity, less acidic taste
4 tomatoes (fresh or tinned)
8-15 potatoes, fairly whole
4 large carrots
2 bay leaves
3 onions, quartered
Turn the oven on to about 150°C. Take your roasting tin and coat it in a layer of butter. Although it is enamel and self-basting, this will make sure, as producers are a little over-confident in their own products' capabilities. So, peel your potatoes, cut your carrots. You can parboil them or you can leave them unboiled and put them later straight in the roaster. Anyhow, take the butter, rosemary and peppercorns, and grind into a consistency. Spread it out on the top of your lamb and put it in the roaster, alone, for 15 minutes.
Put two of the onions, the carrots, the potatoes and bay leaves in the roaster and cook for a further half and hour to 45 minutes.
Before you remove it from the oven, get your tomatoes and red wine, plus more rosemary and the last of the onions. Give them a good blitzing in the mixer.
Pour the liquid around the outside of the roaster, leaving the lamb untouched.
Put it back in the oven for at least an hour, removing the lid for the last 20 minutes and serve the meat thickly sliced.