Preheat the oven to 425°F.
Line a large, rimmed baking sheet with high-heat-resistant parchment paper.
Arrange the frozen broccoli florets in a single layer on the prepared baking sheet. Don't thaw them first.
Liberally spray them with olive oil, then sprinkle them with kosher salt, black pepper, garlic powder, and dried thyme.
Bake the florets until browned and crispy, about 30 minutes. Start checking after 20 minutes and be prepared to bake for as long as 40 minutes - it all depends on the size of the florets and on how hot your oven runs.
Serve immediately.
