Ziti Panggang Tiga Keju

Bahan-bahan (8 porsi)

• 2 tablespoons olive oil
• 1 ounce pancetta, finely chopped (optional)
• 1 large onion, finely chopped
• 4 g arlic cloves, minced
• ½ teaspoon crushed red pepper flakes
• 2 tablespoons tomato paste
• 1 28 -oz. can tomato sauce
• 1 14 -oz. can crushed tomatoes
• 1 teaspoon salt (more to taste)
• 1 pound ziti
• 8 ounces mascarpone cheese
• 1 clove garlic, grated
• pinch of salt
• 8 ounces fresh mozzarella cheese, shredded
• 8 ounces provolone cheese, shredded