Mince the mint leaves finely and mash the cloves of garlic to form a paste.
In a small bowl mix the mint, garlic, salt, vinegar and olive oil.
Wash the cucumbers and slice them finely with the mandolin (I like slices no thicker than 1/8 inch).
Place the cucumber slices in a medium bowl and pour over the dressing. Mix with two spoons and serve.
Notes
You can use English cucumbers if you prefer
You can mix the dressing in a jar. In fact, you can double the quantities and save half of it for another salad, the dressing keeps well in the fridge for a few days.