Your roast potatoes sound great. I really like them too. You might consider what I do to make them. I preheat the oven to about 375 degrees. I then cut the cleaned potatoes in cubes. I get a piece of tin foil and place the potatoes in the middle. I then sprinkle liberally with olive oil. Salt, pepper, garlic powder, onion, green pepper and cilantro. Actually the parm sounds good. I then gather the edges of the foil and seal. Bake in the oven or place on the grill for about 45 minutes.