Prepare the potatoes:Slice and sprinkle with thyme, oregano, salt, and a drizzle of olive oil. Let them rest for 5 minutes. Spread on a baking tray and roast at 200°C for 20 minutes.
Prepare the aubergines:Slice, season with thyme, oregano, salt, and olive oil. Let them rest for 5 minutes Take the tray with the potatoes out of the oven and layer the aubergines on top
Roast for another 20 minutes.
Prepare the zucchini (optional):Slice and season just as you did with the potatoes and aubergines, letting them rest. Take the tray with the potatoes and the aubergines out of the oven and layer the zucchini on top.
Roast for 20 more minutes.
In the meantime, you shoud have started preparing the meat sauce:Heat the olive oil with the minced garlic to add its aroma to the oil. Sauté the onions, peppers and carrots until soft, add the minced meat and stir in the tomato paste and wine/cognac, let cit ook briefly.
Add the tomato sauce and season with cinnamon, bay leaf, herbs, salt, and pepper. Simmer until thickened.
Once it has cooled a little, stir in ¾ of the béchamel that you may have already set aside to help the sauce hold its shape.
Make the béchamel sauce:Melt the butter in a small pot, whisk in flour, and cook briefly. Slowly add warmed milk while whisking constantly until smooth and creamy.
Remove from heat, stir in grated cheese, nutmeg, salt, pepper, and beat in the egg.
Assemble the moussaka:Once you have taken the tray with the three layers of vegetables oout of the oven, spread the meat sauce evenly on top. Pour the béchamel over the top and sprinkle with grated cheese.
Bake at 180°C for 20–30 minutes, until the béchamel is golden and set.Let rest a few minutes before slicing and serving.