Kachumber

Slice a quarter of a red onion into fine strips, cover with cold water in a small bowl and leave it a minute.

Seed and stem a tomato and cut it into thin strips.

Halve a third of a cucumber lengthwise, scoop out the seeds with a spoon and slice into thin crescents.

Drain the onion, pat it dry and add it to the bowl with a large pinch of salt; leave five minutes for the juices to mingle.

Add the juice of a quarter of a lime.

Add 20 coriander leaves, half whole and half chopped, and mix.