1.Preheat the oven to 200°C (400°F).
2.Wash and cut the potatoes into bite-sized pieces.
3.Toss the potatoes with olive oil, salt, and pepper, then spread them out on a baking sheet.
4.Roast the potatoes in the oven for about 30-40 minutes, or until golden and crispy, stirring occasionally.
5.Once roasted, remove the potatoes from the oven and sprinkle with grated parmesan cheese.
6.Serve the roasted potatoes hot with aioli for dipping.