The primary ingredient in a traditional moussaka is eggplant. This classic Mediterranean dish features layers of sautéed eggplant, spiced meat (often lamb or beef), and béchamel sauce, all baked to perfection. The eggplant is typically sliced, salted, and sometimes pre-cooked to reduce its moisture content and bitterness. Moussaka varies by region, with some versions including potatoes or other vegetables, but the eggplant remains the star ingredient, providing a rich texture and flavor that is central to the dish's appeal.