1. Preheat oven to 400F.

2. While oven is preheating, bring a large pot of salted water to a boil. Once boiling, par-cook potatoes until about 1/2 done- about 10-12 minutes.

3. Meanwhile, whisk minced garlic with olive oil and rosemary if using.

4. Drain potatoes well and spread on a parchment-lined baking sheet.

5. Toss potatoes with garlic olive oil and a large pinch of salt.

6. Roast in oven 20-25 minutes, flipping halfway, until crispy.

7. Toss with shredded or grated parmesan and serve hot.