Cut the melanzane lengthwise into slices (about 1 cm thick), season generously with salt, rest for a good 1 hour (removes the bitter flavor). Meanwhile, peel the prawns from the shell/crust, peel and finely chop the onion and garlic cloves.
Dice the raw ham. Rinse the salted slices of melanzana, dry them, turn them in flour on the other side, fry them in hot oil (2 minutes on each side), then drain them on paper towels. Place the slices of melanzana on top of each other in an ovenproof dish and spread the diced ham (lean if possible) evenly over the top. In 4 tbsp. hot oil (from the frying of the melanzane) fry finely chopped onion and garlic cloves. Sauté onion and garlic cloves until golden brown. Add 2 tbsp flour, sweat lightly, pour milk. Stir with a whisk until smooth. Gradually add beef broth, stir until a uniform sauce is formed. Season with salt, pepper, a pinch of nutmeg. Pour the sauce over the melanzane. Spread cheese, breadcrumbs or both mixed evenly over evenly, put a few flakes of butter. Cook in the preheated. Cook at 200 °C for 10 minutes. Serve hot!
Tip: Always use an aromatic ham, it will give your dish a wonderful touch!