Bring a large pot of water to a boil. Add the pasta and cook at a rolling boil until tender.
While the pasta is cooking, melt the butter in a skillet. Add the sage and cook over low heat for 4 minutes.
Drain the pasta and toss it with the sage butter. Add salt and pepper, and the grated Parmesan. Toss well, and serve with extra Parmesan on the side.</