Final answer:
The main ingredient in Greek moussaka and Arab baba ghanoush is Eggplant.
Step-by-step explanation:
The main ingredient in Greek moussaka and Arab baba ghanoush is Eggplant. Moussaka is a popular Greek dish made with layers of eggplant, ground meat (usually lamb), and a creamy bechamel sauce. Baba ghanoush is an Arab dish made with roasted eggplant, tahini, garlic, lemon juice, and olive oil.