Bring a large pot of heavily salted water to a boil over high heat.

Meanwhile, combine pistachios, oil, mint, and garlic in a medium bowl and season with salt and black pepper.

Once water is boiling, add pasta and cook according to package instructions. When pasta is ready reserve 1 cup cooking liquid then drain pasta. Return drained pasta to the pot along with pistachio mixture and half of the reserved cooking liquid. Toss until well coated, if pasta seems dry add more cooking liquid. Taste and add more salt and pepper if necessary.