Italian tradition. Canadian milk. American persistence. Calabro Cheese’s ricotta di bufala required input from three countries and a decade of effort before the Connecticut company had a viable product. The cheese now has earned multiple ribbons from the American Cheese Society and is poised for takeoff. Like other water-buffalo cheeses, Calabro ricotta di bufala is not inexpensive (I paid $3.49 for a four-ounce basket), but if successful, it may persuade others to ponder the potential for water buffalo in the U.S. We can hope.