Watermelon Arugula and Feta Salad

Bahan-bahan (4 porsi)

• 3 cups seedless watermelon (cubed and chilled)
• 1/2 cup crumbled feta
• 7 oz arugula
• 1/4 small red onion (sliced very thin)
• 2 tbsp balsamic vinegar
• 2 tbsp extra virgin olive oil
• kosher salt and fresh pepper