Deep-fry the eggplants over high heat in a cauldron. Preheat the oil. Dip eggplant slices in butter in portions, fry, stirring, until a homogeneous crust forms. Eggplants are fried quickly, and they do not take very much oil. Put the finished eggplants on a napkin to remove the oil. If desired, during baking, you can sprinkle eggplants with fine salt, just a little.