Preparation In medium saucepan over high heat, combine 4 1/2 cups water, sugar, and ginger and bring to a boil. Reduce heat to low and simmer, uncovered until syrupy and reduced by half, about 40 to 45 minutes. Strain into medium bowl, cover with plastic, and refrigerate until cool, about 1 hour.
Preparation In medium saucepan over high heat, combine 4 1/2 cups water, sugar, and ginger and bring to a boil. Reduce heat to low and simmer, uncovered until syrupy and reduced by half, about 40 to 45 minutes. Strain into medium bowl, cover with plastic, and refrigerate until cool, about 1 hour.