- 175g/6oz unsalted butter
- 2 tbsp olive oil
- 1 x 750g/1lb 10oz boned pork loin with rind still attached
- 4 garlic cloves, sliced
- 6 sage leaves
- 2 unwaxed lemons, zest removed in strips, cut in half
- 1.5 litres/2½ pints full-fat milk
- 500g/1lb 2oz waxy potatoes, peeled and left whole
- 1 head cavolo nero, chopped
- salt and freshly ground black pepper
- Preheat the oven to 160C/140C Fan/Gas 3.
- In a large ovenproof pan or casserole, heat 100g/3½oz butter and the oil. Add the pork fat-side down and cook until golden-brown and crisp.
- Remove the pork from the pan and set aside. Fry the garlic and sage for 1-2 minutes. Add the lemon zest, squeeze in the juice and drop in the rest of the lemon. Add the milk and bring to the boil.
- Season the pork shoulder with salt and freshly ground black pepper. Put it, fat-side up, into the hot milk. Add the potatoes and cook in the oven for 1½ -2 hours, or until the pork is very tender.
- To cook the cavolo nero, heat the remaining butter in a large frying pan. Once hot, add the cavolo nero and a few tablespoons water. Cook until wilted.
- Remove the pork from the sauce carefully and slice thickly. Place on serving plates, pour over the sauce and serve with the cavolo nero.