Slow roast shoulder of lamb with sliced potatoes
- 2.25kg/5lb whole shoulder of lamb, skin on
- 4 garlic cloves, sliced
- 2 large onions, cut into quarters
- 750g/1lb 10oz waxy potatoes, such as Desiree, peeled and cut into thick 2cm/¾in slices
- 570ml/1pint hot lamb or beef stock
- green vegetables, to serve
For the gravy
Preheat the oven to 220C/200C Fan/Gas 7.
Sit the lamb, skin-side up, on a board. Using a sharp knife, insert irregular holes through the skin. Insert the garlic into the holes.
Place the lamb in a roasting tin and roast for about 20 minutes until brown. Carefully turn the lamb over and roast for a further 20–30 minutes until brown all over.
Boil the onion in water for 10 minutes, then add the potatoes and boil for 4 minutes. Drain well.
Remove the lamb from the tin. Add the onions and potatoes to the tin and mix together. Add the stock to the tin, then put the lamb on top and cover tightly with foil.
Reduce the temperature of the oven to 160C/140C Fan/Gas 3 and cook for 3½–4 hours, or until the lamb is completely tender. Remove the lamb from the tin and place on a board. Strain off the fat from the tin into a small bowl in order to use in the gravy. Increase the oven to 220C/200C Fan/Gas7 and put the potatoes and onions back into the oven to brown for 25 minutes.
To make the gravy, spoon the lamb fat into a saucepan. Add the flour and stir over the heat for 30 seconds. Whisk in the stock, wine, redcurrant jelly, Worcestershire sauce and browning. Whisk until thickened and bubbling.
Carve the lamb and serve with gravy and potatoes and onion. Serve with green vegetables.