"To grate the potatoes" means to use a grater, a tool with small sharp holes, to turn potatoes into small strips or shreds by rubbing them against the grater's surface.
Sentences with «to grate the potatoes»
I can't quite remember how many cups of grated potatoes it was, but I think it was roughly 3 cups in total. (healthynibblesandbits.com)
Skin problems, such as wounds, burns, and rashes can be treated topically, with a compress of raw grated potatoes in order to reduce inflammation and prevent infections. (herbazest.com)