Preheat oven to 425°F. Line a large rimmed baking sheet with parchment paper.
Toss potatoes with dressing, onion powder, dill, garlic powder, salt and pepper in a medium bowl. Spread in a single layer on the prepared baking sheet.
Roast the potatoes, stirring once halfway, until crispy on the outside and tender inside, 25 to 30 minutes. Sprinkle with herbs before serving, if desired.