01 - Set oven to 375°F and allow to fully preheat before preparing the eggplant.
02 - Arrange eggplant slices, season both sides with salt and pepper.
03 - Dip each slice in beaten egg, followed by coating in breadcrumbs on both sides.
04 - Place breaded eggplant slices on a baking sheet lined with parchment paper. Drizzle lightly with olive oil. Bake for 20 minutes, flipping slices halfway until golden.
05 - Layer baked eggplant with marinara sauce, mozzarella, and Parmesan to form stacks. Repeat layering until ingredients are used, finishing with cheeses on top.
06 - Return assembled stacks to the oven and bake for 25 minutes, or until cheese is fully melted and bubbling.