The next time you see those interesting colored potatoes at the grocery, don't pass them by for the 5 or 10 pound bag of Russets. Do yourself a favor and try some. The key here is to have them as close in size as possible so they will all cook about the same time.
Preheat your oven to 425 degrees. Toss the potatoes with a little olive oil and sea salt and black pepper. Put on a baking sheet and roast for about 15 - 18 minutes. No butter needed here because they are incredibly flavorful.