Heat oven to 425°F (220°C). Line a rimmed baking sheet with parchment. Rinse the potatoes and pat them very dry.
Toss the potatoes with olive oil, salt, pepper, and Italian seasoning. Arrange cut sides down in one layer and roast for 20 minutes.
Add the minced garlic and half of the Parmesan, turning the potatoes so they are coated. Roast 8 to 10 minutes more, until fork-tender and browned at the edges.
Sprinkle with the remaining Parmesan and return to the oven for 1 to 2 minutes, just until the cheese softens. Watch closely so the garlic does not scorch.
Finish with parsley, taste for salt, and serve hot.