Slice eggplants, salt, and rest 30 mins, then pat dry.
Set up breading station with flour, eggs, breadcrumbs.
Coat slices in flour → egg → breadcrumbs. Arrange on sheet.
Preheat oven to 400°F. Brush slices with olive oil.
Bake 25 mins, flipping halfway, until golden.
Spread sauce in 9x13 dish, layer eggplant, cheeses, sauce.
Repeat layers, top with mozzarella. Cover with foil.
Bake at 375°F 30 mins. Remove foil, bake 15 mins until bubbly & golden.
Rest casserole 10 mins before slicing and serving.