Put the eggplants in layers in a colander with a little coarse salt between the slices.
Put a weight on top (a caserolle filled with water will do) and put away for 1 hour so the salt can "pull out" the bitter juice.
Rins the eggplants under cold running water and squeeze them well.
Heat the olive oil in a pan.
Brown thew eggplants in the oil on both sides, drain them on kitchen paper.
Warm the oven to 200C / 400 F.
Crush the tomatoes and season with salt and pepper.
Cover the bottom of an ovendish with some crossed tomatoes, then a layer of eggplants, more tomatoes, some of the chopped basel leafs, half the Mozzarella and half the Parmesan.
Repeat untill all ingredients are finished.
Put in the oven for 30 minutes untill the topside is golden brown.