Begin by dicing the cucumber, tomato, and red onion into small, uniform cubes. If desired, soak the diced red onion in cold water for about 10 minutes.

In a mixing bowl, combine the diced cucumber, tomato, red onion, and chopped cilantro. Stir gently to mix.

Drizzle olive oil and lime juice over the ingredients. Season with salt and pepper to taste.

Toss the salad until thoroughly coated in dressing. Allow it to sit for 10-15 minutes before serving.