Cucumber and Watermelon Salad

• 1 small red onion, halved and sliced into thin half-moons
  
• 2 tablespoons lime juice, or more to taste
  
• 2 tablespoons extra-virgin olive oil
  
• 1 seedless watermelon, cut into cubes
  
• 3 baby cucumbers, seeded and cut into cubes
  
• 1 cup crumbled feta cheese
  
• 1/2 cup mint leaves, sliced thinly
  

1. Mix red onion with lime juice in a bowl; set aside to marinate at least 10 minutes. Stir olive oil into mixture.
2. Toss watermelon, baby cucumbers, and feta cheese together in a large bowl. Pour the red onion mixture over the watermelon mixture; toss to coat. Sprinkle mint over the salad; toss.