Preheat your oven to 375°F (190°C). Arrange your eggplant and potato slices on a baking sheet, lightly oil, salt, and bake for 15 minutes or until tender.
Meanwhile, in your skillet, cook the ground lamb over medium heat until browned. Discard the excess fat.
Add the onion and garlic to the skillet with the lamb, cooking until the onion is translucent, a sweet gesture like the twinkle in your lover's eyes.
Pour the wine into your skillet, allowing it to simmer and reduce. The aroma will fill your kitchen like a secret whispered in the moonlight.
Stir in the diced tomatoes and cinnamon, then season with salt and pepper. Let this simmer for about 15 minutes, the flavors mingling like two lovers' hands intertwined.
Now, let's layer our whispers. In your oven-safe dish, layer the eggplant, followed by the potato slices. Spoon the lamb mixture over this, then pour over your béchamel sauce, covering like a warm embrace. Sprinkle the feta on top, like stars twinkling in the night sky.
Bake this for about 45 minutes, or until golden. Let it rest for a few minutes before serving, like a soft sigh of contentment after a slow dance.
Bon appétit, my dear lovers. Here's to shared smiles, to love, and to an unforgettable Greek getaway right in your kitchen.