In a large mixing bowl, combine the broccoli florets, blueberries, diced apple, shredded carrots, red onion, and sunflower seeds. Toss gently to mix the ingredients evenly.
In a separate small bowl, whisk together the Greek yogurt, honey, apple cider vinegar, salt, and black pepper until smooth.
Pour the dressing over the salad mixture and toss until all the ingredients are well coated.
For best flavor, cover the salad and refrigerate for at least 30 minutes before serving to allow the flavors to meld.
Serve chilled and enjoy!