Place the couscous in a heatproof bowl, pour ⅓ cup of boiling water over it, cover, and let stand for a minimum of 5 minutes until the water is absorbed.
¼ cup Fine couscous
While the couscous cools, finely chop the parsley and mint, and finely dice the tomato, onion, and cucumber if using.
2½ cups Flat leaf parsley, 2 medium Tomatoes, 1 medium Onion, ¼ cup Mint leaves, 2 small Cucumbers
In a large bowl, combine the parsley, mint, tomato, onion, and cucumber. Fluff the cooled couscous with a fork and add it to the bowl along with the lemon juice, olive oil, and salt. Toss well, then taste and adjust the lemon, salt, or oil before serving immediately.