Very carefully cut the rind off of your watermelon, then slice it into 1 inch thick slices.
Stack a few slices up and slice vertically then horizontally to create nice, even, cube-like pieces.
In a large bowl or serving platter, add in arugula, watermelon cubes, cucumbers, mint and feta cheese.
Drizzle your beautiful salad with fresh lime juice and olive oil, then season to taste with a touch of sea salt and pepper if desired.
Gently toss to combine, serve and enjoy!