Fresh corn – often called sweetcorn to differ­entiate it from the starchier varieties – is a delicious, cooling treat. I love it slightly charred on the grill, so it gets a smoky flavour, but it’s also good when simply blanched, then served with melted butter. If the sweetcorn you buy is really fresh, there is no need to cook it – you can eat it raw. If you prefer to cook the vegetable, blanch it only briefly – for 30 seconds or less – or it will lose its crisp texture. Vietnamese cold pork...