Adjust an oven rack to the middle position and preheat oven to 450 degrees. In a large bowl, add potatoes, olive oil, garlic, rosemary, and salt and pepper (I like 1 teaspoon salt and 1/2 teaspoon pepper) and toss until evenly coated.
Transfer to rimmed baking sheet and spread in an even layer, potatoes cut-side down. Roast until brown spots begin to form on the potatoes, stirring occasionally, about 35 to 40 minutes. Sprinkle with Parmesan cheese and serve.
Notes
Potatoes: I love small red new potatoes because the skins are thin and tender and I like the red color. You can use white skin potatoes, any kind of baby potatoes, even russet or baking potatoes as long as they're cut up into bite-sized pieces.
Yield: This recipe makes 4 servings, 1 cup each.
Storage: Store leftovers covered in the refrigerator for up to 4 days. Leftover potatoes are delicious in scrambled eggs and omelets.