This simple recipe from CHOW lets these brilliant pistachios shine.
Fill a large pot with water and add enough salt so that the water tastes like the ocean. Bring to a boil over high heat.
Meanwhile, place pistachios, olive oil, mint and garlic in a medium bowl and stir to combine. Add measured Pecorino Romano and a large pinch of salt and stir to combine; set aside.
Cook pasta in the boiling water according to the package directions. Drain-reserving 1 cup of the cooking water-return pasta to the pot, and place over low heat. Add reserved pistachio mixture and 1/2 cup of the reserved cooking water and toss until pasta is coated with sauce. Taste and season with more salt, pepper, and cheese if you choose. If needed, add a little more cooking water to loosen the sauce. Transfer to bowls or a serving platter, garnish with scallions, and serve, passing additional olive oil on the side.