I once cooked this for a big luncheon party alongside a nice, rare, roasted leg of lamb and everyone ignored the leg to tuck into the shoulder. The shoulder is cooked long and slow and is so tender by the end that it's literally falling off the bone. It takes five and a half hours not counting prep time, so you have to plan ahead, but once it's in the oven it's pretty much trouble-free.
You can prep the lamb the night before, which will give the garlic and rosemary more time to penetrate the meat and give you an extra half hour in bed.
We had some leftovers - lamb, roast potatoes and gravy - so I made a Moroccan-inspired shepherd's pie topped with a mix of baked squash and the roasties (below).
Slow Roast Lamb Shoulder (serves"6-8 with seconds"]
1 large shoulder of lamb, about 3kg
3 fat cloves of garlic, peeled and cut into slivers
A few sprigs of rosemary
2 onions, peeled and cut into quarters
2-3 medium-sized carrots, scrubbed and trimmed
Half a head of celery, sliced crossways into chunks
Salt and pepper
Cut slits into the lamb shoulder and insert slivers of garlic and tiny sprigs of rosemary (not the woody bits unless you want to be picking them out of your teeth later). Season well with salt and pepper and if you're doing this the night before, set aside in the fridge.
Remove the lamb from the fridge half an hour before you start cooking. Preheat the oven to 190C/375F/Gas Mark 5.
Scatter the onions and carrots across the base of a large roasting tin and sit the shoulder of lamb on top. Pour in the water, tent with foil and place in the oven.
After half an hour, turn the oven down to 150C/300F/Gas Mark 2 and cook for another four hours. Remove the foil and cook for a further half an hour to allow the lamb to brown.
Remove from the tin and keep warm. Discard the veg in the pan (you can save them for a soup or the shepherd's pie if you're feeling thrifty). Skim off any fat and thicken the gravy with either a little cornflour dissolved in a few tablespoons of water or for a glossier finish, whisk in some beurre manié (equal quantities of butter and flour mashed together to a paste). A couple of glasses of red wine don't go amiss, either: one for the gravy, one for the cook.
Try serving it with roast potatoes, a separate tin of roasted root veg and a big bowl of lightly-cooked greens. It's also good with steamed, well-drained leeks tossed in a little seasoned cream and sprinkled with a few chopped chives or spring onion tops.
Spicy Shepherd's Pie (serves 2-4)
I like Moroccan flavours with lamb but you can leave out the spices if you like for a more traditionally English result.
I made the topping with the leftover roast potatoes and extra butternut squash, but it's just as good if you use the spuds mixed with leftover cabbage or sprouts, a la bubble and squeak, in which case omit the ras el hanout and grate a bit of parmesan over the top.
Around 400g leftover slow roast shoulder of lamb
1 onion, peeled and chopped
1 stick of celery, chopped
1 carrot (optional) peeled and chopped
1 tspn ground cumin
1 tspn ground coriander
300 ml gravy from the roast (and maybe some stock to loosen it, depending on quantities)
1 glass of red wine or a squeeze of tomato puree (or both)
For the topping:
About 300g roasted butternut squash, weighed after cooking and peeling
About 250g leftover roast potatoes
A knob of butter
Salt and pepper
1 tspn ras el hanout (or to taste)
Preheat the oven to 200C/400F/Gas Mark 6.
Chop the meat quite finely - I think this is nicer (and creates less washing-up) than mincing it. If you do it in a food processor, don't turn it into a slurry. It should still have texture.
In a deep, heavy frying pan heat a tablespoon of oil and fry the chopped onion, celery and carrot until softened. Stir in the cumin and coriander and cook gently for another minute.
Add the meat and stir well. Pour in the red wine and/or tomato puree along with the gravy (add stock or water if you don't have enough liquid) and cook until the mixture has thickened and reduced and the flavours have blended.
Check the seasoning and spoon into a gratin dish. Allow to cool.
In a food processor, blitz the roast potatoes but stop before they turn into mush - again, you want some texture.
Scrape the softened squash out of its skin and mash it with a good knob of butter and the ras el hanout, if using.
Stir in the blitzed roast potatoes. Check the seasoning and add plenty of ground black pepper plus salt to taste. Spoon onto the meat mixture, roughing up the top so you get some roasty, toasty bits when it's cooked.
Cook in the oven for around 30 minutes or until the top is golden brown and the filling is piping hot.