Feta, a cheese of the mainland that has taken over the entire Greek market and has a slightly sour taste and a creamy texture. Authentic feta is made primarily from sheep’s milk, with a small amount of goat’s milk, and is naturally very white. The cheap cow’s milk feta produced in northern Europe and the United States is treated with a chemical to make it white and is nothing like the real thing. Feta should be stored in its salty brine to keep it fresh; if this is not possible, buy only a small quantity at a time and store it in a covered container in the refrigerator, where it will keep for 3 to 4 days. If you want to grate feta, leave a piece uncovered overnight in the refrigerator to dry.
