Bring a huge pot of salted water to a boil.
Add pasta and five minutes before its cooking time is up, add the broccoli rabe.
Drain rabe and pasta together and pour into serving bowl.
In the same pot or a tiny one, heat the olive oil with the garlic, pepper flakes and Kosher salt over moderate heat, stirring frequently for 3 to 4 minutes, or until the garlic becomes lightly golden.
Pour mixture over pasta and toss to evenly coat.
Shower with freshly grated cheese and eat at once.
