Homemade ginger ale isn't as tricky as you'd think! You can perfect your tang and sweetness levels.
In a medium-size saucepan, heat the water and ginger until it reaches a low simmer. Simmer for five minutes. Remove from the heat and cover. Let stand for 1 hour.
In a tall glass, add 1 part lime juice (about 1/2 lime per glass), 2 parts ginger syrup, and 3 parts sparkling water. Stir to combine the liquids. Fill glass with ice. If desired, add fresh mint.