In a high speed blender, chop the pistachios until finely ground. Remove 2 tablespoons of the ground pistachios. Set aside.,
STEP 2
Add the basil, green onions, garlic, lemon juice, salt, pepper and olive oil to form a pesto. Add the milk on top of the pesto and continue blending until the sauce is completely smooth and creamy. Set aside.,
STEP 3
Bring a large pot of well-salted water to a boil over high heat. Cook the pasta until al dente, about 5 minutes, according to the package directions. Drain and rinse with cold water. (if using traditional pasta, drain, but do not rinse),
STEP 4
Add the pasta back to the pot along with pistachio sauce over medium heat, stirring frequently, until the pasta is warmed through and well combined with the sauce, 1 to 2 minutes.,
STEP 5
Sprinkle the reserved pistachios on top, garnish with extra basil and serve immediately.