01 - Combine the diced mango, grated ginger, lime juice, honey or agave syrup, and 1/2 cup cold water in a blender. Blend until completely smooth and no chunks remain.
02 - Pour the blended mixture through a fine mesh sieve into a pitcher or bowl, pressing with a spoon to extract all liquid while removing fibrous ginger and mango pulp.
03 - Fill two serving glasses with ice cubes, leaving room for the mocktail mixture.
04 - Divide the strained mango-ginger puree evenly between the prepared glasses, filling each about halfway full.
05 - Top each glass with chilled sparkling water, pouring slowly to maintain carbonation. Gently stir once to combine the flavors.
06 - Decorate each glass with fresh mango slices, lime wedges, or mint sprigs as desired. Serve immediately while chilled.