This ginger-lime soda is my fave. Bring 3 cups of water to a boil. Add ginger, reduce heat, and simmer on low for 5 minutes. Set aside for 20 minutes; strain ginger. In a separate saucepan, combine sugar and 3/4 cup water; simmer until sugar dissolves. For each drink, mix 1/2 cup ginger water, 2 TBSP each sugar syrup and lime juice, and 1/2 cup club soda.