1Wash and dry the cucumbers. Cut off the ends and slice them in half lengthwise.
2Place the cucumber halves cut side down on a cutting board and gently smash them with the side of a knife or a rolling pin until they crack and split.
3Cut the smashed cucumbers into bite-sized pieces and transfer to a large bowl.
4In a separate bowl, mash the feta cheese with lemon juice, olive oil, and cracked black pepper until combined.
5Pour the feta dressing over the cucumbers and toss to coat evenly.
6Add the roasted pistachios and chopped fresh dill. Toss gently to combine.
7Serve immediately or chill for 10-15 minutes before serving.