Preheat the oven to 200 degrees C for 10 minutes. While the oven heats, assemble the dish.
Put a layer of tomato sauce as the first layer.
Cover it with a layer of fried eggplant slices.
Top it with mozzarella and parmesan cheese.
Then add another layer of tomato sauce, followed by eggplant slices, followed by cheese.
Continue this way. The top layer should be that of tomato sauce and cheese.
Cover the baking dish with aluminium foil and bake at 200 deg C for 20 minutes.
Then, remove the foil and bake it for another 20 minutes at the same temperature.
Then, remove it from the oven and let it cool a bit on the kitchen counter (for at least 15 minutes).
Now, Eggplant Parmigiana is ready to be served.