Chicago-Style Deep Dish Pizza

Ingredients

• 1 1/2 cups + 2 tbsp (8 1/8 oz) all-purpose flour
• 1/4 cup (1 3/8 oz) yellow cornmeal
• 3/4 tsp salt
• 1 tsp sugar
• 1 1/8 tsp. instant yeast
• 1/2 cup + 2 tbsp (5 oz) water, at room temperature
• 1 1/2 Tbsp unsalted butter, melted
• 1 tsp extra-virgin olive oil
• 1 1/2 tbsp unsalted butter, softened
• 1 tbsp unsalted butter
• 1/4 cup onion, finely diced
• Pinch of dried oregano
• 1/4 tsp salt
• 3 cloves garlic, minced or pressed
• 1 (14.5 oz) can crushed tomatoes
• Pinch of sugar
• 2 tbsp fresh basil leaves, coarsely chopped
• 1 1/2 tsp extra-virgin olive oil
• Ground black pepper
• 2 tbsp extra-virgin olive oil
• 8 oz fresh mozzarella, shredded (about 2 cups)