Preheat oven to 450°F with a rack in lowest position. Punch down dough, transfer to a lightly floured work surface, and cut in half. Stretch one piece of dough, working outward from center, into an oval, approximately 9 by 13 inches. Brush 2 tablespoons oil onto a rimmed baking sheet. Place dough on sheet; top evenly with mozzarella, leaving a 1-inch border of dough around edges.