Preheat the oven to 400ºF and line a large sheet pan with parchment paper.
Set a steaming basking into a medium saucepan. Place the broccoli into the basket and set the pan over medium heat. Steam the broccoli for 3 minutes. It should be bright green and only slightly tender.
Drain the broccoli and let cool a few minutes. Then pat dry with tea towels to reduce as much moisture as possible.
In a small bowl, whisk together the parmesan, Italian seasoning, and garlic powder. Sprinkle the prepared baking sheet evenly with the mixture.
Arrange the broccoli florets in a single layer over the parmesan mixture. Use a flat bottomed glass to smash the broccoli to about 1/2 inch thickness.
Drizzle the tray lightly with olive oil and sprinkle to taste with salt and pepper. (Go lightly on the salt, as Parmesan is quite salty and you can add more later!)
Bake 25 to 30 minutes, or until the cheese is browned and the broccoli is crisp. Let cool a few minutes before serving.
Notes
Storage Information: Store the smashed broccoli in a covered container in the fridge for up to 5 days. It won't be as crispy as it was, but you can re-heat it in a warm oven and that should help!