Measure the farro into a colander and rinse it under cold running water.
Cook:
Place the rinsed farro in a pot with the water or stock and salt. You can omit the salt if you're using stock. Turn the heat to high and bring it to a boil.
Once it boils, reduce heat to medium-low, and simmer for 30 minutes until the grain is tender. Drain off any excess water -usually there's none left- and fluff with a fork.