At Marrakesh:
The Sultan Sampler (grilled brochette of either beef or chicken served with a Beef Brewat Roll and Chicken Bastilla served with vegetable couscous ) is definitely more than enough food for two adults.
The Lemon Chicken ( braised half chicken seasoned with garlic, green olives and preserved lemon) is beyond delicious and can be easily shared (although we usually order soup or bastilla to go with it).
My parents split the Berber Feast (jasmina salad, roast lamb meshoui, chicken kabob and seasonal fruit salad) and could not finish it.
I've only had dinner at Yak & Yeti, so sorry I can't help there. Happy eating!!!