A very popular Greek semi-hard cheese produced traditionally from sheep's milk or a mixture of sheep's and goat's milk.  It has a wonderfully rich aroma with a salty, nutty, piquant flavour. It is pale yellow in colour and has a soft edible rind with little holes throughout. Its texture is smooth and creamy.  It can be found in the deli/cheese section of most larger supermarkets or from Greek delicatessens it can be replaced with softer Kasseri or feta or even parmesan cheese.