Clean cucumbers and strawberries, slice cucumbers into thin half-moons, hull, and quarter strawberries.

Thinly slice red onion and place all prepared ingredients in a large bowl.

Chop mint leaves roughly and set aside.

In a separate bowl, whisk together Greek yogurt, apple cider vinegar, honey, poppy seeds, salt, and pepper until smooth.

Slowly drizzle in olive oil while whisking until dressing is emulsified.

Fold in feta cheese, mint, and red pepper flakes into the salad bowl.

Pour the dressing over the salad and gently toss to coat all ingredients evenly.

Serve immediately for the best flavor and freshness.