TIP: To make the clam pizza in the oven, preheat the oven to 425°F. Spread the pizza dough into rounds on 2 rimmed baking sheets. Brush with olive oil, then sprinkle each round with ½ teaspoon salt and ¼ teaspoon pepper. Sprinkle with the mozzarella and half of the pecorino romano. Scatter over the clam mixture, leaving a 1/2-inch border around the edge of the dough. Bake until the crusts are golden and crisp, about 15 minutes. Continue with step 8 of the recipe.