Slice the eggplants into 1/4-inch rounds, sprinkle with salt, and let sit for 30 minutes. Rinse and pat dry.
Set up a breading station with flour, beaten eggs, and a breadcrumb mixture. Dredge each eggplant slice in flour, dip in eggs, and coat with breadcrumbs.
Preheat oven to 375°F. Bake breaded eggplant slices for 25-30 minutes, flipping halfway through.
Spread a layer of marinara sauce in a baking dish, layer half of the eggplant, half of the marinara, and half of the mozzarella. Repeat layers.
Bake assembled dish for an additional 25-30 minutes until cheese is bubbly and golden. Let cool for 10 minutes before serving.