Impepata di cozze is Naples' elemental mussel dish—nothing more than fresh mussels steamed open in their own liquor and finished with a blizzard of freshly cracked black pepper and a squeeze of lemon, yet in this radical simplicity lies a dish of startling elegance that has opened meals along the Bay of Naples for centuries. The preparation demands impeccable mussels—preferably the dark-shelled cozze of the Gulf of Naples, plump and briny from the mineral-rich waters off the Phlegraean coast. Each mussel is scrubbed, debearded, and inspected: any that remain open after a sharp tap are dead and discarded. The mussels go into a large, heavy pot over fierce heat with nothing else—no wine, no garlic, no oil, no stock. The pot is covered and the mussels steam in their own seawater, releasing a liquor of extraordinary salinity and sweetness. Shaking the pot periodically ensures even cooking, and the moment the shells gape open—typically three to four minutes—the heat is cut. Overcooking turns mussels from plump and tender to shrivelled and rubbery. The coarse black pepper is cracked generously over the opened mussels, its pungent warmth creating a dialogue with the briny sweetness. Lemon juice is squeezed over at serving—some purists omit even this, arguing the mussels need nothing but pepper. The liquor pooling in the pot is liquid gold: it is ladled over crusty bread (pane cafone) at the table, and many Neapolitans consider this mussel broth-soaked bread the true point of the dish. Impepata is typically served as an antipasto or light primo at seaside trattorie, where the proximity to the source guarantees the freshness the dish absolutely requires. No butter, no cream, no white wine—the Neapolitan approach trusts the ingredient completely.
Use only impeccably fresh mussels. Steam in their own liquor—no added liquid. Generous freshly cracked black pepper. Serve immediately with the pot liquor. Crusty bread for soaking up the broth.
Purge mussels in cold salted water with a tablespoon of flour for an hour to expel sand. The pot liquor can be strained through muslin and used as a base for risotto or pasta sauces. A tiny drizzle of raw olive oil at the end is acceptable to some Neapolitan cooks.
Adding wine or stock (unnecessary with fresh mussels). Overcooking until mussels shrivel. Using pre-ground pepper instead of freshly cracked. Discarding the precious cooking liquor. Using mussels that aren't completely fresh.
La Cucina Napoletana — Jeanne Carola Francesconi; Arthur Schwartz, Naples at Table