INGREDIENTS
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1 tablespoon olive oil
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4 ounces pancetta or bacon, thinly sliced
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1/2 medium yellow onion, thinly sliced
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3 cloves garlic, thinly sliced
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Pinch crushed red pepper
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One 28-ounce can whole tomatoes, crushed, with juices
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Kosher salt
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About 1 1/2 pounds of your favorite pasta
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3 tablespoons finely grated Pecorino-Romano or Parmesan, plus more for serving