Castelluccio di Norcia, Perugia province, Umbria — specifically the Piano Grande plateau at 1452m. IGP status since 1997. The lentil cultivation on the plateau dates to at least the medieval period; the specific variety is documented in Norcia market records from the 14th century.
Lenticchie di Castelluccio IGP are tiny lentils grown at 1400m on the Piani di Castelluccio — a high plateau in the Monti Sibillini massif in eastern Umbria. The altitude, the limestone soil, and the harsh climate produce a lentil with exceptional characteristics: very small (2-4mm), with a thin skin that needs no soaking and cooks in 20-25 minutes, with a concentrated flavour combining earthiness, sweetness, and a slight mineral sharpness. They are cooked simply — in water with garlic, rosemary, and good olive oil — and served as a first course or accompaniment to cotechino or zampone at New Year.
Castelluccio lentils have a complex flavour that reflects their mountain terroir — earthy, slightly nutty, with a minerality from the limestone soil. Cooked simply and finished with good Umbrian oil, they are a vegetable dish of unexpected complexity. The thin skin means you eat the complete lentil rather than just the interior — the skin contributes texture and a slight bite.
No soaking required — the thin skin means they absorb water fast. Rinse and place in cold water (3 parts water to 1 part lentils), bring to a simmer, add garlic and rosemary. No salt until fully cooked — salt added early toughens the skin. Cook 20-25 minutes — they should be tender but intact, not mushy. Season aggressively once cooked. Finish with a generous pour of cold-pressed Umbrian olive oil. The ratio of olive oil to lentils is generous — the oil is the sauce.
The Castelluccio plateau in May-June produces one of the most spectacular wildflower displays in Italy — the lentil flowers combined with poppies, cornflowers, and buttercups cover the entire plateau in a patchwork of colour. The lentils can be purchased directly from Castelluccio farmers. The New Year tradition: Castelluccio lentils with cotechino is among the most codified festive food rituals in central Italy.
Over-cooking — mushy lentils lose their individual flavour and texture. Salting too early — toughens the skins. Skimping on olive oil — the oil is not garnish; it is the binding flavour element. Substituting any other lentil — Puy lentils are the best substitute but Castelluccio's flavour is not replicable.
Slow Food Editore, Umbria in Cucina; Faith Willinger, Eating in Italy