1. Finely chop parsley (make sure it's dry before you start chopping it, any extra liquid will make the salad soggy).
2. Finely chop mint.
3. Chop tomatoes, remove any excess liquid.
4. Finely chop cucumber and green onions.
5. In a large bowl, mix together vegetables and herbs. Add lemon juice, olive oil, salt and pepper, mix well. Try and add more salt if necessary. The flavor will improve if the salad sits for a few hours.