Prepare the Potatoes:

1. Preheat the Oven: Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper for easy cleanup or lightly grease it with cooking spray.
2. Wash and Cut the Potatoes: Wash the potatoes thoroughly to remove any dirt, then slice them into even wedges or cubes. You can leave the skin on for extra texture and nutrients, but feel free to peel them if preferred.

Season the Potatoes:

3. Coat the Potatoes: Place the cut potatoes in a large mixing bowl. Drizzle with olive oil and toss them to ensure every piece is coated evenly.
4. Add the Seasonings: Sprinkle the garlic powder, onion powder, rosemary (if using), paprika, salt, and pepper over the potatoes. Toss again to distribute the spices evenly.

Add the Parmesan:

5. Add Parmesan Cheese: Sprinkle the grated Parmesan cheese over the potatoes and toss them gently to coat. You want each piece of potato to be lightly coated with the cheesy goodness.

Roast the Potatoes:

6. Transfer to Baking Sheet: Arrange the seasoned and Parmesan-coated potatoes in a single layer on the prepared baking sheet. Make sure the pieces are not overcrowded to ensure they cook evenly and become crispy.
7. Bake: Roast in the preheated oven for 30-35 minutes, or until the potatoes are golden brown and crispy on the edges. Flip the potatoes halfway through the baking time to ensure they cook evenly on all sides.
8. Check for Crispiness: The potatoes should be crisp and golden on the outside while remaining tender on the inside. If you prefer them extra crispy, you can leave them in the oven for an additional 5-10 minutes.

Serve:

9. Garnish and Serve: Once the potatoes are done, remove them from the oven and transfer them to a serving dish. Sprinkle with fresh chopped parsley if desired and serve immediately.