Greek Lamb Moussaka (or Musaka) is an authentic Greek eggplant dish made with layers of aubergines and/or potatoes, tomatoey meat sauce, and silky béchamel.
Heat a large pan on medium heat and put the lamb mince in. Cook until it releases its fat and is nicely browned. Add the onions and garlic, saute until translucent.
To make the béchamel, melt the butter in a saucepan and stir in the flour. Cook for 2 minutes. Whisk in a little of the milk, stirring continuously until you have a smooth sauce.
Top the potatoes with the rest of the ground beef filling. Nicely cover the meat filling with the remaining eggplants and pour over the bechamel sauce.