600g/1lb 5oz large potatoes, peeled and chopped into large chunks
250g/9oz savoy cabbage or kale, finely sliced
400g/14oz swede (known as turnip in Scotland), peeled and chopped into large chunks
salt and freshly ground black pepper
75²µ/2ΒΎ΄Η³ϊ butter
25g/1oz cheddar, grated