
Parmigiano-Reggiano is a hard, fat granular cheese, cooked but not pressed, named after the producing areas of Parma, Reggio Emilia, Modena, Bologna, in Emilia-Romagna, and Mantova, in Lombardy, Italy.
Parmigiano is simply the Italian adjective for Parma; the French version, Parmesan, is used in the English language. The term Parmesan is also loosely used as a common term for cheeses imitating true Parmesan cheese, especially outside Europe; within Europe, the Parmesan name is classified as a protected designation of origin.
I find parmigiano-reggiano the perfect topping for a pasta or pizza dish