Preheat oven to 375.
Toss broccoli florets with olive oil on a rimmed baking sheet, and season with salt and pepper.
While broccoli roasts, core apple and chop into 1/2-inch cubes, with skin on.
Combine yogurt lemon juice, and sugar in a small bowl, mixing until well combined.
Remove broccoli from oven, allow to cool for 5 minutes.
Chop broccoli into bite-sized pieces, and transfer to a large serving bowl.
Add diced apple and dressing, and toss to combine.
Taste and season with additional salt and pepper, if desired.
Cover and refrigerate for 2 hours.
Just before serving, top salad with diced bacon pieces.