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Into a large pot of boiling salted water, add the pasta and cook as per packet directions.
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Add potato into the pot to cook with the pasta.
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To make the pesto, add pistachios and rocket into a food processor and blitz.
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Add Parmesan and blitz again.
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Slowly pour olive into the food processor until the pesto is smooth and add salt and pepper.
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Once the pasta and potatoes are cooked, drain and reserve ½ cup of the cooking water.
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Return the pasta and potatoes to the pot, pour in pesto and gently mix to combine.
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If necessary, add small amounts of cooking water to loosen the sauce.
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Top with extra Parmesan before serving and enjoying with family and friends.
