2 bags kale, no stems (about 320-400g/11½-14oz)
1 onion, roughly chopped
2 sweet potatoes, peeled and chopped
freshly ground black pepper
½ tsp freshly ground nutmeg
2 tbsp olive oil
900ml/1½ pint good-quality vegetable stock
150ml/5fl oz milk
40²µ/1½´Ç³ú Parmesan, grated
200g/7oz bacon lardons