- Use the chef's knife and cutting board to thinly slice the cucumber into half-moon shapes. 
- Chop the watermelon into uniform 1-inch cubes using the same knife and stable cutting board, ensuring even, bite-sized pieces. 
- Transfer the sliced cucumber and watermelon cubes into a large mixing bowl, gently tossing to combine. 
- Crumbly feta cheese is sprinkled over the mixture, then lightly drizzled with olive oil if desired. Season with salt and pepper to taste. 
- Toss everything gently until evenly distributed. Transfer the mixture to a serving platter and serve immediately to maintain freshness.