Bring a large pot two-thirds full of salted water to a boil over high heat. Add the pasta and cook until al dente according to the package instructions.
Meanwhile, in a blender, combine the cashews, hemp seeds, garlic clove, nutritional yeast, milk, lemon juice, 1½ teaspoons salt, and ¾ teaspoon pepper. Blend on high speed until smooth and creamy, about 1 minute.
Drain the pasta