Start by rinsing the cucumbers under cool water. Peel if necessary and slice into thin half-moon slices about ¼ inch thick.

Place cucumber slices in a colander, sprinkle with kosher salt, and let sit for 30 minutes.

Chop scallions into thin slices and soak in ice water for 20 minutes to enhance crunchiness.

In a mixing bowl, combine cucumbers, scallions, red onion, and mint leaves. Add crushed red pepper flakes, vinegar, and black pepper.

Gently toss all ingredients together; taste and adjust seasoning as needed.

Drizzle with extra-virgin olive oil, toss again, and serve immediately.