Preheat oven to 400 degrees. Lightly spray a baking sheet with non stick cooking spray.
In a large bowl add the olive oil, parmesan cheese, garlic, and oregano. Toss with the potatoes until coated and lay in a single layer on your baking sheet. Salt and pepper to taste. I also like to sprinkle additional parmesan on top.
Roast for 30-35 minutes or until golden brown and crisp. Serve with parsley sprinkled on top.