Preparation

• 位置a rack in the center of the oven and heat the oven to 400°F.
• On a large rimmed baking sheet, toss the potatoes with 3 Tbs. of the olive oil, 1-1/2 tsp. of the rosemary, 1/2 tsp. salt, and 1/4 tsp. pepper. Spread in a mostly single layer and bake until the potatoes are cooked through and soft, about 7 minutes. Remove from the oven and set aside.
• Put a pizza stone on the lowest rack of the oven, increase the oven to 550°F, and let the stone heat for at least a half-hour.
• Lightly flour a pizza peel. Stretch one dough ball into a 10- to 11-inch round and transfer it to the peel. Sprinkle with 1/2 tsp. of the rosemary. Arrange half the potato slices over the round, overlapping them slightly and gently pushing them into the dough. Slide the dough onto the hot stone and bake until the crust is nicely browned, about 8 minutes.
• Transfer to a cutting board. Drizzle with a little olive oil, if you like, and sprinkle with half of the cheese and half of the remaining rosemary. Season to taste with salt. Repeat to make the second pizza.