A creamy sheep's milk cheese at its best in Winter. This is the most well known cheese produced in Portugal. The lid of this circular cheese is lifted off, revealing, when young, a tasty creamy paste smiilar to Brie. This is from December to July. As it ages it becomes harder and more pungent.(PDO). Avoid cheeses sold as 'Tipo Serra' which means Serra-type, rather than the real thing.