A thin, light brown skin covers ginger's irregular, knobby shape. Its beige, moist flesh is best known for adding zest to dishes of all sorts. Fresh ginger should be peeled before using. Rubbing ginger with the blade of a spoon works. Substitute 6 parts fresh ginger for 1 part ground ginger. Cover pieces of ginger root in plastic wrap and freeze. To add to a recipe, remove a piece and grate, no need to thaw. Tightly covered, ginger can be kept frozen for up to three months. Ginger has been thought to be effective for treating nausea caused by seasickness, morning sickness and chemotherapy.