INGREDIENTS
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pound gemelli, fusilli, or other short pasta
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tablespoons unsalted butter
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leeks (white and light green parts only), halved lengthwise then crosswise
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kosher salt and black pepper
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pound peeled and deveined medium shrimp (raw)
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• finely grated zest of 1 lemon
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cup heavy cream
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ounces baby spinach (about 12 cups)