In a small bowl, whisk together the Greek yogurt and lemon juice. Set aside.

Slice the cucumbers into thin rounds. Thinly slice the red onion.

In a large mixing bowl, combine the cucumbers and red onions.

Add the prepared yogurt dressing and mix until the cucumbers are well coated.

Sprinkle in the salt, black pepper, lemon zest, and chopped dill. Gently toss to combine all the ingredients.

Chill for 10–15 minutes before serving for best flavor, or enjoy immediately.