Wash and dry your cucumbers, cherry tomatoes, and red onion. Slice the cucumbers lengthwise and into thin half-moons. Halve the cherry tomatoes.

Thinly slice the red onion and set aside.

Finely chop the cilantro and mint leaves, and set them aside.

In a large mixing bowl, combine the sliced cucumbers, cherry tomatoes, red onion, cilantro, and mint leaves. Toss gently.

In a separate bowl, whisk together lime juice, fish sauce, sugar, and red chili flakes until sugar is dissolved.

Pour the dressing over the salad and toss gently. Let the salad sit for 5-10 minutes before serving.