INGREDIENTS
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1 Tbsp extra-virgin olive oil
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5 garlic cloves, minced
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3 scallions, thinly sliced
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2 leeks, white and light green parts only, trimmed and thinly sliced
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1 medium shallot, chopped
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1 anchovy fillet, drained
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Pinch of crushed red pepper
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1 lb spaghetti, noodles broken in half
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3 ¾ cup chicken stock
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¾ cup heavy cream
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½ tsp kosher salt, plus more for seasoning
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2 Tbsp chopped chives
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¼ cup freshly grated Parmigiano-Reggiano cheese, plus more for serving