- 1 1/2 cups water
- 1 cup sugar
- 1 cup thinly sliced unpeeled fresh ginger (1/4 lb; from two 5-inch-long pieces)
- 3 cups unsweetened pineapple juice, chilled
- 1/4 cup fresh lemon juice (3 to 5 lemons)
- 1/4 cup fresh lime juice (4 to 6 limes)
- 3 cups sparkling water, chilled
- 4 cups ice cubes
- Garnish: lemon and lime slices
- Special equipment: a small punch bowl or pitcher
- Bring water, sugar, and ginger to a boil in a 1- to 1 1/2-quart saucepan, stirring until sugar is dissolved. Simmer, uncovered, stirring occasionally, 10 minutes, then remove from heat and steep, uncovered, 15 minutes. Pour syrup through a sieve into a bowl, discarding ginger. Chill, covered, until cold, about 2 hours.
- Stir together ginger syrup and fruit juices in a punch bowl or pitcher. Stir in sparkling water and ice.