THE STAYING POWER of feta cheese is a bit scary. You can lose a block in the fridge for a month or more and find it’s still perfectly fine to eat. A cheese that never goes bad naturally seems suspect. It’s also useful in these homebound times.
There are reasons—none of them nefarious—that sharp, briny feta lasts so long. Originally made by shepherds in the mountains of Greece, it needed to last. It was made with a relatively high salt content to help preserve it. The brine it’s traditionally stored in further delays spoilage….