Wash and peel the cucumbers. Slice them thinly, about 1/4 inch thick.

In a large mixing bowl, combine the sliced cucumbers with red onions and cherry tomatoes.

In a small bowl, whisk together olive oil, lemon juice, salt, and pepper until well blended.

Pour the dressing over the cucumber mixture and gently toss until well coated. Let it sit for about 10 minutes.

Transfer the cucumber salad to a serving dish and enjoy it chilled.