INGREDIENTS
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2 tablespoons olive oil
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6 ounces pancetta, diced
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1 yellow onion, finely chopped
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2 garlic cloves, minced
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Pinch crushed red pepper flakes
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1 (14-ounce) can crushed tomatoes
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1/2 teaspoon kosher salt, plus more for seasoning
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1/2 teaspoon freshly ground black pepper, plus more for seasoning
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1/2 cup grated Pecorino Romano
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1 small (6-ounce) onion, grated
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1/2 cup chopped fresh flat-leaf parsley, plus 1/4 cup
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2/3 cup grated Parmesan cheese, plus 1/4 cup
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1/3 cup Italian-style bread crumbs
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1 large egg
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2 tablespoons ketchup
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3 garlic cloves, minced
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1/4 teaspoon crushed red pepper flakes
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1 teaspoon kosher salt, plus more for seasoning
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1/2 teaspoon freshly ground black pepper, plus more for seasoning
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8 ounces ground beef
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8 ounces ground veal
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2 ounces smoked mozzarella cheese, cut into 16 (1/2-inch) cubes
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1 pound bucatini or other long pasta