Slice the seedless watermelon into thick, juicy cubes using a sharp knife and a steady hand; set them in a large serving bowl.
Crumbled feta cheese generously over the watermelon, scattering unevenly for a rustic look and flavor distribution.
Tear fresh mint leaves and sprinkle them over the salad, adding a bright, aromatic green that enhances the dish’s freshness.
Drizzle a good splash of extra virgin olive oil over the salad, giving it a silky sheen and rounding out the flavors.
Squeeze fresh lemon juice over everything, brightening the flavors with a tangy citrus aroma and a slight pop of acidity.
Finish by grinding fresh black pepper over the top, adding a spicy kick that balances the sweetness and saltiness.
Gently toss the salad with a large spoon or spatula, ensuring the feta, mint, and dressing are evenly distributed without crushing the watermelon.
Serve immediately for the freshest texture and most vibrant flavor, or refrigerate for up to an hour to let the flavors meld.