01 - Rim the glasses with lime juice, then dip in coarse salt or sugar if desired. Set aside while preparing the drink mixture.
02 - In a blender, combine watermelon cubes, lime juice, orange juice, and agave syrup. Blend until very smooth and fully incorporated.
03 - Strain the mixture through a fine mesh strainer into a pitcher to remove pulp for a smoother consistency. This step is optional but recommended for the best texture.
04 - Fill prepared glasses with ice cubes. Pour the strained watermelon mixture evenly over the ice in each glass.
05 - Garnish each glass with fresh lime wedges and watermelon slices. Serve immediately while chilled.