Peel the aubergines and slice them into 1 inch slices. Season with salt and set them aside to drain.
Meanwhile, make the tomato sauce. Stir-fry finely chopped onion and mushrooms. Season with paprika and keep stirring for about a minute. Add the tomatoes and leave to simmer for 10-15 minutes. If the sauce is too thick, add a little bit of water. Just before it’s ready add the crushed garlic and finely chopped parsley.
Preheat a grill pan and grill the aubergine slices for a minute or two each side. In a baking tray alternate one later of aubergine, one layer of tomato sauce.