Halve the cucumber portion, scrape out the seeds with a spoon and then use a box grater to grate. Squeeze the grated cucumber between your hands to remove as much of the water as possible. Set aside.

In a bowl combine the yoghurt, garlic, oil, vinegar and seasoning. Taste and add more salt or vinegar as required.

Stir in the drained grated cucumber and leave for half an hour for the flavours to combine.