Wash the cucumbers, sweet bell peppers, red onion, and fresh parsley under cool running water.

Chop the cucumbers and sweet bell peppers into bite-sized cubes, slice the red onion thinly, and finely chop the parsley.

In a small bowl, whisk together olive oil, lemon juice, salt, and black pepper to create a dressing.

In a large bowl, combine the chopped vegetables and toss them together gently.

Pour the dressing over the mixed vegetables and toss until everything is well-coated.

Cover the bowl with plastic wrap and refrigerate for at least 30 minutes.

After chilling, toss the salad gently and serve in a bowl.