Preheat your oven to 180°C (350°F).
Heat olive oil in a pan and lightly fry the aubergine slices until golden brown on both sides. Season with salt and pepper while frying.
In a baking dish, spread a layer of tomato sauce.
Place a layer of aubergine slices over the sauce.
Cover with a layer of lasagne sheets, followed by béchamel sauce and a sprinkle of parmesan cheese.
Repeat the layers until you run out of ingredients, ending with a layer of béchamel sauce and parmesan on top.
Bake in the preheated oven for 45 minutes or until golden and bubbling on top.
Let it rest for 10 minutes before serving.
Garnish with dried oregano if desired and serve hot.