Preheat the oven to 400°F (200°C).
Wash and scrub the potatoes thoroughly, then pat dry.
Slice the potatoes in half lengthwise.
In a large bowl, mix olive oil, garlic powder, thyme, salt, and pepper.
Toss the potato halves in the oil mixture until well-coated.
Place the potatoes cut-side up on a baking sheet.
Sprinkle grated Parmesan cheese generously over the potatoes.
Bake in the preheated oven for 30-35 minutes until golden and crispy.
Garnish with fresh parsley before serving.