Preheat Oven – Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Prepare Potatoes – Wash and dry the fingerling potatoes, then cut them in half lengthwise.
Season – In a bowl, toss the potatoes with olive oil, minced garlic, rosemary, salt, and black pepper until evenly coated.
Roast – Spread the potatoes in a single layer on the baking sheet, cut side down. Roast for 25-30 minutes, flipping halfway, until golden and crispy.
Add Cheese (Optional) – Sprinkle parmesan cheese over the potatoes in the last 5 minutes of roasting.
Finish with Butter (Optional) – For extra richness, toss the roasted potatoes with a tablespoon of butter before serving.
Serve – Transfer to a serving dish and garnish with extra rosemary if desired.