1. In a large saucepan bring stock to the boil then remove from heat. Stir in CousCous gradually then cover and stand for 5 minutes. Fluff with a fork and set aside.
  2. Put lime juice, oil and honey in an old jar and shake until combined or whisk well in a bowl. Season with pepper.
  3. To the CousCous add the cucumber, carrots, capsicum, avocado, prawns and mint. Combine well.
  4. Add dressing to CousCous.