Preheat oven to 400°F (200°C). Line two baking sheets with parchment and lightly grease.
- Place eggplant slices on paper towels. Sprinkle with salt and let sit for 30 minutes to release moisture. Pat dry.
- Set up a dredging station: one bowl with flour, one with beaten egg, and one with breadcrumbs mixed with 1/4 cup Parmesan.
- Dredge each eggplant slice in flour, then egg, then breadcrumbs. Arrange on baking sheets.
- Lightly spray with olive oil and bake for 20–25 minutes, flipping halfway, until golden and crisp.
- Lower oven to 375°F (190°C). Spread a layer of marinara in a 9×13-inch baking dish. Add a layer of baked eggplant, sauce, mozzarella, and Parmesan. Repeat layers, ending with cheese on top.
- Cover with foil and bake for 25 minutes. Uncover and bake an additional 10–15 minutes until bubbly and golden.
- Let cool for 5–10 minutes. Garnish with fresh basil or parsley and serve.