In the hills of southern Umbria, the Bartolini family have been growing olives, grains, and what they call pulses (legumes) since the 1850's. Their lentils are famous throughout Italy and beyond for their outstanding color, texture, & flavor. Pale brown and tan in color, the crops of Umbrian lentils are actually quite small, so the demand often outweighs the supply.
The fabled Castelluccio lentils are not a protected DOP product—this means the Italian government hasn't yet clamped down on imposters and refined the market to include only the authentic lentils of Castelluccio. The incredibly tiny town in Umbria called Castelluccio simply can't produce enough lentils for the world's demand.