-
Cook the pasta in plenty of boiling salted water, stirring occasionally; until al dente.
-
Meanwhile, heat the walnuts in a large skillet over low heat, stirring, until fragrant (about 3 minutes).
-
Add in butter; stir until melted.
-
Drain the pasta, leaving plenty of moisture still clinging to the surface of the noodles.
-
Transfer to a platter; pour half of the walnut butter on top; toss.
-
Add the remaining walnut butter and a generous layer of grated cheese; serve.