Preheat oven to 475°F. Line a baking sheet with parchment paper. Spread broccoli slices out evenly on the baking sheet, making sure the slices aren't piled on top of each other.
Remove broccoli from oven, stir and flip the broccoli, and then spread the broccoli back out on the baking sheet. Evenly top each broccoli slice with some of the cheese.