Begin by washing your cucumbers and sweet bell peppers thoroughly under cool running water to remove any dirt. If desired, peel the cucumbers to enhance their texture. Dice both the cucumbers and bell peppers into bite-sized pieces, ensuring they are all roughly the same size for even mixing. Place them in a large mixing bowl, ready for the next step.

Add the diced cucumbers and sweet bell peppers to the mixing bowl along with finely chopped red onion and fresh parsley. Gently mix the ingredients using a spoon or spatula, being careful not to mash them.

In a separate small bowl, whisk together a generous amount of olive oil and freshly squeezed lemon juice. Add salt and freshly cracked black pepper to taste, ensuring the dressing is well-balanced. Whisk until emulsified and smooth.

Pour the dressing over the combined vegetables in the large bowl. Gently toss everything together using a pair of tongs or a spoon, being careful to coat all the ingredients evenly.

Cover the bowl with plastic wrap or transfer the salad to an airtight container. Place it in the refrigerator and allow it to chill for at least 30 minutes.