You can remove zest with a zester, a small handheld tool that removes thin strips of zest whenpulled across the outside of the fruit, a microplane (the long silver tool in the picture) or a regular grater.
Grate gently so you’re only getting zest,not pith. Turn the fruit and grate in a new spot when you see thewhite pith. Don’t pack zest tightly in your measuring spoons or you may end up with more citrus flavor than you need. If you’re using a microplane or grater, check the back or non-cutting surface to remove any zest that sticks.