The original and authentic Benihana ginger sauce recipe is double the amount given above in the recipe card. It calls for 5 ounces of onion and 2 ounces of fresh ginger, which can seem like a lot! If you are worried about the ginger quantity, start with less. You can always add more!Also, if using dried ground ginger it is more potent than fresh ginger. Start with less and adjust by tasting your dipping sauce.*Benihana's signature ginger dipping sauce tastes best after being refrigerated, if not overnight, then at least for an hour or more.**Ginger sauce may be stored in an airtight container in the refrigerator for up to one week.