Pickled turnips

Pickles, usually a mixture of turnips, carrots and celery, are typical in Tunisian cooking and are often added to couscous for extra bite. They are easy to make (though they need to be prepared at least 3 hours in advance) and keep well in the refrigerator for several months, unopened. Mina serves them in small bowls alongside olives with an aperitif. If you like fiery flavours, add half a teaspoon of harissa diluted in a little water. The citrus juice can be replaced by vinegar, if desired