Peel the cucumber and cut it into thin slices. Peel the ginger and cut it into thin strips and then into sticks.
Put in a bowl, pour the vinegar, salt, add the chilli cut in four, then the oil and emulsify.
Shell the prawns.
Chop the basil or mint leaves.
Put the cucumber slices in a salad bowl, pour over the contents of the bowl, mix, add the prawns and the herbs, mix again and serve immediately.
