01 - Rim the glasses with lime juice, then dip in coarse salt or sugar if desired for a classic margarita presentation.
02 - Combine watermelon cubes, lime juice, orange juice, and agave syrup in a blender. Blend until completely smooth and no chunks remain.
03 - Pour the blended mixture through a fine mesh strainer into a pitcher to remove pulp for a smoother consistency.
04 - Fill prepared glasses with ice cubes. Pour the strained watermelon mixture evenly over the ice.
05 - Garnish each glass with fresh lime wedges and watermelon slices. Serve immediately while cold.