Of all the summer soups, this leek and potato classic has to be one of the best loved. It is a little ironic that leeks are in fact at their best from November through to April, not really months in which a chilled soup is going to be of much appeal. Still, they are readily available all year round and none the worse for that. I’ve added celery to this as well as an onion; purists may well frown on these additions but I think they add great flavour. You could of course just add an extra leek or two and leave them out – entirely up to you.
This makes enough for four
1 tablespoon rapeseed oil
small knob of butter
3 large leeks
1 large stick celery, stringy bits removed
About 3 medium new potatoes (you want about half the weight of the leeks)
750ml chicken stock
200ml double or whipping cream
lots of chopped chives
olive oil (if making the chive oil)
Sea salt and black pepper
Chop all the vegetables, (having peeled the potatoes). Heat the oil and butter together in a saucepan. Add the leeks, celery and onion and sweat gently over a low heat until beginning to soften. Do not allow them to colour.
Add the potatoes and stir around. Add the stock and bring up to a gentle simmer. Season well and then cook gently for about fifteen minutes or until the vegetables are very soft. Liquidise or use a stick blender so that the soup is extremely smooth. You could also pass it through a sieve for an ultra smooth finish.
Whisk in the cream and check the seasoning. Pour into a bowl and chill for at least two or three hours, longer if possible.
Serve in chilled bowls with chives, chive oil and a little more cream swirled on top.
To make the chive oil, simple put chopped chives into a pestle and mortar and add extra virgin olive oil and a little sea salt. Pound until the chives break down and the oil starts to turn green.