Whizz together until blended, but still chunky. Season with pepper and spoon half into a serving dish, sprinkle over the remaining chives and serve with lots of crisp, fresh, raw veg sticks. You can also grill a few soft flour tortillas until crisp, then snap them into pieces. Pop them under a hot grill – they take about a minute each, turning once. The other half of the dip will keep refrigerated for three days.