Preheat oven to 425 degrees F.
Line a baking sheet with aluminum foil and add potatoes. Drizzle with olive oil and season liberally with kosher salt and black pepper. Toss the potatoes until they are well coated and then place all the potatoes with the cut side down.
Bake for 25-30 minutes or until the bottom begins to brown and the inside is soft and cooked through. If you want them extra crispy, you can also use the broiler for another 2-3 minutes.