7 ounces uncooked fresh green tea noodles or 5 ounces dry green tea noodles from 1 (7-ounce) pack 4 celery stalks , thinly sliced diagonally (about 1 1/2 cups ) ...

The second is Chinese celery, a leafier, skinnier-stalked version of the familiar green head; you can substitute regular celery here, without much difference.