Yes yes to couscous.
Could you do cold mezze starters as nibbles that lead into the main course and can be left as sides?
I had a delicious carrot mezze in Turkey recently that was v easy to make and would go with your meal. Grate four medium carrots, fry in garlic and olive oil until softened (approx 10 m) then cook on low heat turning once for 20 min, remove and let cool in fridge and stir in a touch of natural yog. Absolutely divine.
Mezze board also include: grilled courgette, roasted aubergine, tziki, humous, olives and flat bread.