In a large mixing bowl, combine the cooked couscous, diced cucumber, diced tomato, sliced olives, and chopped parsley.
In a small jar or bowl, whisk together the olive oil, lemon juice, salt, and pepper.
Pour the dressing over the couscous mixture and toss gently to combine everything evenly.
Serve immediately, or chill in the refrigerator for 30 minutes to allow the flavors to meld.
Notes
This salad is highly adaptable. Add crumbled vegan feta, chickpeas for protein, or chopped fresh mint for extra freshness. It keeps well in the fridge for up to 2 days, making it perfect for meal prep.