Once the oil is hot, add about half of the potatoes in a solid, thin layer. Season the top with salt and pepper. Let them cook, undisturbed for about 4-6 minutes. Around the 4 minute mark, start checking around the edges. Once it's golden brown to your liking, flip them. Season the other side with salt and pepper, and let the second side cook for another 4-6 minutes, or until they are browned to your liking.