© Quentin Bacon
Active Time
10 MIN
Total Time
3 HR
Yield
Serves : Makes 6 cups

F&W's Grace Parisi makes this soda with iSi's new Twist 'n Sparkle soda maker, which carbonates beverages in less than 30 seconds. $50; williams-sonoma.com.    More Nonalcoholic Drinks  

How to Make It

Step 1    

In a medium saucepan, combine the sliced ginger with the smashed lemongrass and 4 cups of the water and bring to a boil over high heat. Stir in the sugar. Cover and let the ginger-lemongrass syrup steep off the heat until cool, about 2 hours.

Step 2    

Strain the syrup through a fine-mesh sieve. Discard the ginger and lemongrass. Stir in the lemon juice and the remaining 2 cups of water. Refrigerate until chilled.

Step 3    

Make the soda according to the manufacturers' directions. Serve in tall glasses over ice, garnished with lemon wheels and lemongrass stalks.

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