Cut ripe watermelon into bite-sized cubes and spread them out on a tray.
Place the watermelon cubes in the freezer and freeze for at least 2 hours, or until solid and icy.
Once frozen, remove the watermelon cubes from the freezer and allow them to sit for a few minutes to slightly soften.
Add the frozen watermelon cubes to a blender along with the fresh lemon juice.
Blend on high speed until the mixture becomes slushy and smoothly blended, with a texture similar to crushed ice.
Pour the slushie into glasses, letting the icy pink mixture mound slightly over the rim.
Garnish with a small slice of lemon or a sprig of fresh mint if desired for added visual appeal and aroma.
Serve immediately with a straw or spoon, enjoying the cold, chunky texture of this summer refresher.
