Made from fresh ginger, the juice is used in marinades to give a subtle ginger taste without the pungency of the fresh chopped pieces. Here is a simple method of extracting the juice: cut fresh unpeeled ginger root into 25-mm/l-in chunks and drop them into a running food processor. When the ginger is finely chopped, squeeze out the juice by hand through a cotton or linen towel. Or, mash the ginger with a kitchen mallet or the side of a cleaver or knife until most of the fibers are exposed. Then simply squeeze out the juice by hand through a cotton or linen towel.