The zest is only the outermost layer of the skin in grated form, the peel includes all of the outer skin including the white ...

If you're using oranges, start by slicing the peels and removing most of the pith, the stringy white layer that sits against the outer peel. For a chewier texture and a more mellow flavor ...

The orange pith is the white, spongy layer found between the outer peel (zest) and the juicy segments of an orange. Though it is a part of the fruit's protective structure, it's nutritional ...