Cook the couscous: Lightly toast the couscous with the olive oil in a saucepan over medium heat until it starts to smell nutty. Add 4-5 cups of water and bring to aboil. Reduce heat and boil until al dente (about 8 minutes). Strain through a large sieve, rinse with cold water and strain again.
Make the salad: Mix the couscous with the rest of the ingredients for the salad in a large bowl.
Make the dressing: Transfer the ingredients for the dressing in a jar and shake well to combine and emulsify.
Mix: Pour the dressing over the couscous salad and toss well to combine. Taste and adjust the seasonings. This salad is even better after it's chilled in the fridge for a few hours.
Video
Notes
You can use regular tomatoes instead of grape tomatoes
I normally don't use garlic in this salad, but if you especially like the flavor you can use ½ a teaspoon of dried garlic powder (for mild taste) or 1 minced garlic clove (for stronger taste).
You can use capers instead of olives.
You can use dill weed, fresh coriander or fresh mint instead of parsley (or a mix of the above)