1 cup torn fresh basil leaves, divided
1/2 cup freshly crumbled feta cheese (preferably French or Bulgarian), divided
Red pepper flakes
Salt
Bring a large pot of heavily salted water to a boil over medium-high heat. Add the pasta and cook according to package directions. Reserve 1/2 cup cooking water, then drain the pasta; set aside.
Melt the butter in a large frying pan or skillet over medium heat. Add the corn and cook, stirring frequently, for 2 minutes. Add the reserved pasta water, pasta shells, cream, and half of the basil and cook, stirring occasionally, until thickened, about 3 minutes. Stir in half of the feta and mix until creamy and the shells are coated, about 2 to 3 minutes more.