Preheat the oven to 400°F (200°C) and line a heavy-duty baking sheet with parchment paper.
In a large mixing bowl, combine the cubed sweet potatoes, olive oil, garlic powder, smoked paprika, salt, and pepper.
Add half of the grated Parmesan cheese to the bowl and toss until the potatoes are thoroughly coated in the cheese and spice mixture.
Arrange the sweet potatoes in a single layer on the baking sheet, ensuring space between pieces for even roasting.
Roast for 30 to 35 minutes, turning the potatoes with a spatula halfway through, until the edges are golden brown and crispy.
While the potatoes roast, prepare the high-protein dip by whisking together the Greek yogurt, minced garlic, the remaining Parmesan cheese, and chopped parsley.
Remove the sweet potatoes from the oven and immediately sprinkle with hemp seeds for added texture and protein.
Transfer the roasted potatoes to a serving plate and serve alongside the Greek yogurt dip.