In a mixing bowl, combine the Greek yogurt, honey, lemon juice, apple cider vinegar, and poppy seeds. Whisk these ingredients together until smooth and well blended. Set the dressing aside.
In a large bowl, add the fresh broccoli florets, diced apple, and blueberries. Toss these ingredients gently to ensure they are evenly distributed throughout the bowl.
Pour the prepared dressing over the broccoli mixture in the large bowl. Use tongs or a spatula to gently toss everything together until all pieces are evenly coated in the creamy dressing.
Cover the salad with plastic wrap or transfer it to an airtight container before placing it in the refrigerator. Allow it to chill for at least one hour.
After chilling, give the salad another gentle toss before serving it on individual plates or in a large serving bowl.