Ginger will keep well in the refrigerator for at least a couple weeks. If cooking sherry is added, it will last for months. It can also be frozen for 2-3 months. If you are going to freeze extra ginger, peel it first; grating frozen ginger is even easier than grating fresh ginger.
When you are buying ginger, you do not need to buy a huge amount. Most recipes only call for an inch or two of ginger. Simply break a knob, about the size you need, off a large piece of ginger.
Try peeling ginger with a spoon. The skin is very thin and just rubbing the tip of the spoon across the ginger removes it easily. Once the ginger is peeled, you can slice it into disks, create matchsticks or dice it fine. A microplane works great to finely grate or mince it as well.
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