Salting pulls excess water out of the eggplant so it crisps up instead of turning mushy in the oven. I lay my slices on paper towels, sprinkle them with kosher salt, and let them rest for about an hour. Afterward, I rinse off the salt and pat each slice completely dry before moving on.
I like lining up three shallow dishes: one with flour, one with beaten eggs, and one with a mix of panko, breadcrumbs, and parmesan. This assembly-line approach makes breading each eggplant slice fast and mess-free. Preheating the oven to 400°F now saves time later.
Each slice gets dipped first in flour, then egg, then the breadcrumb mixture before landing on a greased baking sheet. I bake them for 15 to 18 minutes, flipping halfway, until they're golden and crisp. Let them cool slightly before handling.
While the eggplant bakes, I whisk together ricotta, egg, parmesan, lemon zest, parsley, salt, and pepper in one bowl. This filling can be made ahead and chilled, which is a huge time-saver on a busy night. It should be thick and spreadable, not runny.
Any good tomato sauce works here, whether homemade or a trusted jarred brand. I usually make a simple garlicky marinara because it lets the crispy eggplant shine. A thicker sauce also helps prevent the stacks from getting soggy.
I spread a layer of sauce in my baking dish, then start stacking eggplant, mozzarella, and more sauce, repeating the layers. Each stack gets topped generously with the ricotta mixture and a sprinkle of extra mozzarella or parmesan. Building individual towers instead of a casserole keeps portions neat and pretty.
The assembled stacks go back into the 400°F oven for about 20 minutes, just until the cheese is melted and golden. I watch closely near the end since ovens vary and cheese can brown quickly. Once it's bubbling and fragrant, it's ready to come out.
I finish every stack with fresh basil leaves and an extra spoonful of warm sauce on the side. A light dusting of parmesan right before serving adds one more layer of flavor. This final touch makes the dish feel restaurant-worthy.