Place bread in a small bowl and cover with water. Set aside to soak for 5 minutes, then drain and squeeze dry. Place in a large bowl with chicken mince, green onion, half of coriander and egg. Mix thoroughly and season. Using wet hands, shape into about 16 small balls.
Heat half of oil in a large frying pan on medium. Cook meatballs in batches for 5-7 minutes, tossing frequently, until browned and cooked through. Set aside.
To make Couscous Salad, combine boiling water and remaining oil in a bowl. Stir in couscous, cover and set aside for 5 minutes. Fluff up with a fork to separate grains. Toss through remaining salad ingredients.
Pack meatballs and salad in an airtight container with lemon wedges. Squeeze lemon over salad when ready to eat.