1. Preheat the oven to 200°C (400°F).
Slice the eggplants, peel and slice the potatoes.
2. In the "browning" mode, sauté the onion and garlic in a tablespoon of olive oil.
3. Add the ground meat, stir and let it cook for 2 minutes.
4. In a separate bowl, mix the broth cube, white wine, and tomato paste. Then add 10 cl (1/2 cup) of water and pour the mixture into the pot. Stir and let it cook in the "browning" mode for 2 minutes. Do not add salt as the broth cube already contains a lot of salt.
5. In a gratin dish, layer the potatoes, then a layer of eggplants, and a layer of the tomato and meat sauce prepared in the Cookeo.
Cover with a layer of béchamel sauce and grated Gruyère cheese (or Parmesan) and bake for 30 minutes at 200°C (400°F).
6. Serve with a green salad.