Prepare couscous with the water according to its package. Fluff with a fork and spread in a shallow bowl.
Whisk olive oil, lemon juice, cumin, and a little pepper.
Toss chickpeas, cucumber, tomatoes, and parsley with the couscous and dressing.
Taste before adding salt. Divide into two containers and chill promptly.
Storage: Refrigerate perishables promptly in shallow containers. Use refrigerated leftovers within 3–4 days or freeze earlier. Reheat cooked leftovers to 165°F; keep cold meals chilled during transport. Follow ingredient labels if they require a shorter storage time.