Ingredients:

• For the dough
• 2 cups all-purpose flour
• 2 tablespoons yellow cornmeal
• 3/4 teaspoon salt
• 1 1/4 teaspoons instant yeast
• 1 teaspoon sugar
• 1 teaspoon olive oil
• Flour (for rolling the dough)
• 2 tablespoons unsalted butter, softened at room temperature
• Vegetable oil spray (for the cake pan)
• For the filling
• 1 pound sweet or hot Italian sausage, casings removed, or bulk Italian sausage
• 8 ounces sliced mozzarella cheese
• 1/4 cup grated Parmesan (for the top of the pie)
• For the sauce
• 1 tablespoon unsalted butter
• 1/2 small onion, finely chopped
• 2 cloves garlic, finely chopped
• 1 1/2 teaspoons dried oregano
• 1 teaspoon dried rosemary
• Pinch or two red pepper flakes
• 1 can (28 ounces) crushed tomatoes, or whole tomatoes crushed in a bowl
• 1/4 teaspoon salt
• 1 teaspoon sugar