Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the olive oil, honey, Dijon mustard, apple cider vinegar, garlic powder, salt, and pepper.
Add the cauliflower florets to the bowl and toss them in the honey glaze until well coated.
Arrange the cauliflower in a single layer on the prepared baking sheet.
Bake in the preheated oven for 20-25 minutes, or until the cauliflower is tender and caramelized, stirring occasionally to ensure even cooking.
Remove from the oven and let it cool slightly.
Garnish with chopped parsley if desired.
Serve hot as a side dish or a tasty appetizer.