Wash and clean the aubergines and cut them into slices about 1 cm thick. Peel, wash and slice the potatoes. Heat 6 tablespoons of oil in a large frying pan and fry the aubergine slices for about 3 minutes while turning. Drain the finished aubergines on kitchen paper. Heat 2 tablespoons of oil in a large frying pan and fry the potatoes for approx. 5 minutes, turning them over
Peel and chop the onion and garlic. Heat 2 tablespoons of oil in a frying pan and fry the minced meat for approx. 10 minutes, turning. After about 5 minutes add onion and garlic. Season with salt, pepper, cinnamon and oregano
For the béchamel, melt margarine in a pot. Stir in the flour and sauté briefly. Add stock and milk while stirring. Bring to the boil, let it boil for about 5 minutes, season with salt and pepper. Crumble the feta, grate Gouda coarsely. Take sauce from the stove, stir in cheese. Whisk egg and add to the hot sauce while stirring
Put half the potatoes and aubergine slices in an oiled casserole dish (30 x 22 x 5 cm). Spread half of the chopped mass on top. Layer the remaining potatoes and aubergines on top and spread the rest of the chopping mixture on top. Pour béchamel over the minced meat. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for about 1 hour.