INGREDIENTS
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8 fresh leeks, trimmed, washed and finely chopped (this can be done in a food processor)
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2 sticks of celery, roughly chopped
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1 carrot, roughly chopped
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55g (2oz) butter
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1 tablespoon light and mild olive oil
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2 large baking potatoes, peeled and diced
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1.5 litres (3 pt) vegetable or chicken stock
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150ml ( 1/4 pt) single cream)
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Sea salt and ground black pepper