01 - Place watermelon chunks, strawberries, fresh mint leaves, and coconut water into the blender container.
02 - Pour in lime juice and sweetener if using, adding directly to the blender.
03 - Top with ice cubes to chill and thicken the smoothie.
04 - Process on high speed until completely smooth and frothy, approximately 45 to 60 seconds.
05 - Taste the mixture and add additional mint leaves or sweetener as desired.
06 - Pour into chilled glasses and optionally garnish with fresh mint or strawberry slices.