Preheat your oven to 425°F (220°C). Line a large baking sheet with parchment paper.
In a large mixing bowl, combine the cubed sweet potatoes, olive oil, garlic powder, smoked paprika, salt, and black pepper. Toss well to ensure the sweet potatoes are evenly coated.
Sprinkle the grated Parmesan cheese over the sweet potatoes. Toss again until the cheese clings to the surface.
Pour the sweet potatoes onto the prepared baking sheet, spreading them out in a single layer.
Roast for 25-30 minutes, flipping halfway through, until golden brown and crispy.
Remove from the oven and sprinkle with chopped fresh rosemary. Toss gently.
Garnish with fresh parsley if desired and serve hot.
Notes
For extra crispiness, ensure sweet potatoes are not overcrowded on the baking sheet.
High-quality extra virgin olive oil can enhance the flavor.
Nutritional yeast can be used as a dairy-free alternative to Parmesan cheese.