01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper or lightly grease it with olive oil.
02 - In a large bowl, toss the potato pieces with olive oil, rosemary, kosher salt, black pepper, and minced garlic if using, ensuring an even coating.
03 - Spread the potatoes in a single layer on the prepared baking sheet, placing cut side down to enhance crispness.
04 - Roast in the preheated oven for 30 to 35 minutes, turning once halfway through, until golden brown and crispy on the edges.
05 - Remove from the oven, taste, and adjust salt if necessary. Serve hot, optionally garnished with extra rosemary.