- To make these potatoes, start by preheating your oven to 425 F. 
- Next, wash the potatoes and cut them in half. 
- Then, take your knife and "score" the potatoes by cutting diagonal lines alongside the cut-side of each potato. 
- Transfer the cut potatoes to a large bowl and add in the olive oil, parsley, garlic powder, sea salt, and black pepper. Toss until the potatoes are fully coated in the oil and seasonings. 
- Next, grate the parmigiano reggiano into a bowl and pour the melted butter on top. Mix them together until a thick paste forms. 
- Transfer the paste to a large baking dish and use a spoon or spatula to spread it out evenly across the bottom of the dish. 
- Then, transfer the potatoes to the baking dish and place them cut-side down, pressing them into the cheese mixture. Repeat until all of the potatoes are in the dish. 
- Finally, bake the potatoes for 25-26 minutes. 
- Once they're done, remove them from the oven and allow the potatoes to rest for 10 minutes, until the cheese hardens. 
- Then, use a spatula to remove the potatoes from the pan, serve, and enjoy!