INGREDIENTS
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12ouncesfettuccine (3/4 box)
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110-ounce package frozen lima beans (about 1 1/2 cups)
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1cupfrozen peas
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2tablespoonsolive oil
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2leeks (white and light green parts), cut into half-moons
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kosher salt and black pepper
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3/4cupheavy cream
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2tablespoonschopped fresh tarragon
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1/4cupgrated pecorino or Parmesan (1 ounce)