Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Slice the eggplant into 1/2-inch thick rounds, lightly brush with olive oil, and roast for 15-20 minutes until tender and slightly browned.
While the eggplant roasts, brown the ground lamb in a skillet over medium heat with minced garlic, draining any excess fat if necessary.
Stir in the tomato paste, cinnamon, oregano, sea salt, and black pepper, simmering for 5 minutes to develop the flavors.
In a small bowl, whisk together the Greek yogurt, egg, and grated parmesan cheese until smooth to create the healthy béchamel topping.
In a small oven-safe dish, layer half of the roasted eggplant, followed by the lamb mixture, and then the remaining eggplant slices.
Pour the yogurt béchamel over the top, spreading it evenly to the edges.
Bake for 20-25 minutes until the topping is set and turns a beautiful golden brown.