INGREDIENTS
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Kosher salt
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12 ounces dried spaghetti
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1/4 pound (about 3/4 cup) pancetta or bacon, finely diced
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1/4 cup extra-virgin olive oil
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3 tablespoons (about 4 big cloves) minced garlic
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1 teaspoon red pepper flakes, plus more to taste
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2 teaspoons freshly ground black pepper, plus more to taste
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1/4 cup fresh lemon juice
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1 1/2 cups freshly grated Parmigiano-Reggiano cheese, plus more for serving
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3 cups baby arugula