Parmigiana di melanzane is one of Southern Italy's most contested dishes—claimed by Campania, Sicily, and Emilia-Romagna alike—but the Neapolitan version stands as the canonical reference, a baroque layered construction of fried aubergine, tomato sauce, mozzarella (fior di latte), basil, and Parmigiano-Reggiano that achieves something far greater than the sum of its parts. The aubergines must be sliced lengthwise, roughly 5mm thick, salted and weighted to purge their bitter liquid for at least an hour, then patted completely dry before frying in abundant olive oil or seed oil until deep golden on both sides. This frying step is non-negotiable—baking the aubergine slices, a modern shortcut, produces an entirely different and inferior dish. The tomato sauce is a simple, quick-cooked sugo of San Marzano tomatoes with garlic and basil—it should be bright and acidic to counterbalance the richness of the fried aubergine and melted cheese. Assembly follows a strict logic: sauce on the bottom of the dish, then alternating layers of fried aubergine, sauce, torn fior di latte mozzarella, grated Parmigiano, and fresh basil leaves. The final layer receives extra Parmigiano for the gratin crust. Baking at 180°C for 30-40 minutes allows the layers to meld, the mozzarella to melt into stretchy pools, and the top to form a golden crust. The dish must rest for at least 20 minutes after baking—cutting into it immediately produces a collapsed, soupy mess, while resting allows the layers to set and the flavours to marry. Many Neapolitan families serve parmigiana at room temperature, arguing this is when the flavours are most harmonious. The name's etymology is debated: 'parmiciana' may derive from the Sicilian word for the wooden slats of a shutter (which the layered aubergine resembles) rather than from Parma or Parmigiano cheese.
Salt and purge aubergines thoroughly. Fry in abundant oil until deep golden—never bake as shortcut. Use quick-cooked bright tomato sauce. Layer systematically with fior di latte and Parmigiano. Rest at least 20 minutes before cutting. Serve warm or room temperature.
Fry aubergine in batches to maintain oil temperature. Drain fried slices on paper towels or a wire rack. The dish can be assembled a day ahead and baked when needed—the flavours deepen. Some families add hard-boiled eggs between layers for richness. Press the assembled dish gently before baking to compact the layers.
Skipping the salting/purging step. Baking instead of frying the aubergine. Using too much sauce (makes it soggy). Cutting while still bubbling. Using pre-shredded mozzarella instead of fresh fior di latte. Making the tomato sauce too sweet or too thick.
La Cucina Napoletana — Jeanne Carola Francesconi; Il Cucchiaio d'Argento