Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Arrange the eggplant slices on the sheet, brush with olive oil, and sprinkle with a pinch of the sea salt.
Roast the eggplant for 15 minutes until the flesh is tender and the edges start to turn golden brown.
While eggplant roasts, brown the ground lamb in a skillet over medium heat with the diced onion and minced garlic.
Drain any excess fat from the skillet, then stir in the tomato puree, dried oregano, black pepper, and remaining salt.
Simmer the lamb mixture for 5 minutes to allow the flavors to meld and the sauce to thicken slightly.
In a small mixing bowl, whisk together the Greek yogurt, egg, and parmesan cheese until the mixture is smooth and creamy.
In a small individual-sized baking dish, layer half of the roasted eggplant slices followed by the lamb mixture.
Top with the remaining eggplant slices and pour the yogurt mixture evenly over the top.
Bake for 20 minutes until the topping is set and develops a beautiful golden-brown crust.