01 - Preheat oven to 400°F. Line two baking sheets with parchment paper.
02 - Arrange eggplant slices on the baking sheets. Brush both sides with olive oil and season with salt and pepper.
03 - Roast eggplant for 20 minutes, flipping halfway, until softened and lightly golden. Remove from oven and reduce heat to 375°F.
04 - In a bowl, mix ricotta, Parmesan, egg, basil, nutmeg, salt, and pepper until smooth.
05 - Spread 1/2 cup marinara sauce on the bottom of a 9x13-inch baking dish.
06 - Layer half of the roasted eggplant slices over the sauce. Spread half of the ricotta mixture over the eggplant, then top with 1 cup marinara sauce and 1 cup mozzarella.
07 - Repeat layers with remaining eggplant, ricotta mixture, marinara, and mozzarella.
08 - Sprinkle the top with the remaining 2 tablespoons Parmesan.
09 - Cover with foil and bake for 25 minutes.
10 - Remove foil and bake an additional 15-20 minutes, until bubbly and golden on top.
11 - Let rest for 10 minutes before garnishing with fresh basil and serving.