Squeeze lime juice into a glass, add grated ginger, and stir. Add three large ice cubes. Add kombucha, ginger beer and sparkling water and stir. Garnish with lime wedge if desired.

Tip: Because they have different concentrations of ginger, different brands of ginger beer have varying degrees of flavor. For the most ginger flavor, try Maine Root Spicy Ginger Brew. For a milder flavor try Reed's Extra Ginger Brew.