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2-4
Easy
By Susan Campbell and Caroline Conran
Published 1971
Clean and trim the leeks, keeping the firm white part and the best of the green.
Bring a pan of salted water to the boil, drop in the leeks and let them cook until just tender. Put in a colander and leave to drain and cool.
Mash a clove of garlic with salt, mix with a teaspoon of mustard and plenty of pepper. Add 1½ dessertspoons of vinegar and mix in thoroughly. Now add the oil
