Preheat oven to 375 degrees. Oil a medium baking dish; set aside.
In a medium bowl, toss potatoes together with 2 tablespoons parsley and both oils; season with salt and pepper. Transfer to prepared baking dish, spreading potatoes in an even layer. Bake until soft, about 20 minutes.
Transfer potatoes to a medium skillet over medium-high heat. Cook potatoes until brown and crisp, 2 to 3 minutes; season with salt and pepper and remaining tablespoon parsley; serve immediately.