Pre-heat oven to 425 degrees. Toss potatoes, oil, and rosemary on a rimmed baking sheet. Spread out potatoes in a single layer; season with salt and pepper. Roast, stirring once halfway through cooking, until potatoes are golden brown and crisp outside and tender inside, about 30 minutes.
Crispy Smashed Potatoes Boil potatoes in water until completely cooked through (can poke all the way in easily). Let cool for 10min. Smash the potatoes w/ a cup, coat with olive oil and spices. Bake for another 15min on top rack, then 30min in middle rack - try this with purple potatoes