Preheat the oven to 475ºF. Place the olive oil, garlic and rosemary in a large microwave safe bowl and cover with a large heavy plate or plastic wrap. Place in the microwave and cook on high for 1 minute. While the oil is heating up, peel the potatoes and cut them into 10 wedges each.
Adapted from a Lottie & Doof recipe, which was adapted from a Cook’s Illustrated recipe.