Slice the feta cheese into cubes and add to the cucumber.
Finely chop the chives and dill and tear the basil leaves then add the herbs to the bowl.
In a small bowl, whisk together the lemon juice, olive oil, salt and pepper then pour over the salad.
Toss to combine and serve.
Notes
When I want to make this salad in less than 5 minutes, I don't bother with peeling the cucumber or removing the seeds. However, if you want to prepare the salad in advance, removing the seeds is a good idea.