Chicago-Style Deep-Dish Pizza

INGREDIENTS

• :
• 3¼ cups all-purpose flour
• ½ cup yellow cornmeal
• 1½ teaspoons salt
• 2 teaspoons sugar
• 2¼ teaspoons instant yeast
• 1¼ cups water, room temperature
• 3 tablespoons unsalted butter, melted
• 4 tablespoons unsalted butter, softened
• 1 teaspoon + 4 tablespoons olive oil, divided
• 2 tablespoons unsalted butter
• ¼ cup grated onion
• ¼ teaspoon dried oregano
• ½ teaspoon salt
• 2 garlic cloves, minced
• 1 (28-ounce) can crushed tomatoes
• ¼ teaspoon sugar
• 2 tablespoons coarsely chopped fresh basil
• 1 tablespoon olive oil
• Freshly ground black pepper
• 1 pound mozzarella cheese, shredded (about 4 cups)
• (Pepperoni)
• ¼ cup grated Parmesan cheese