Cook pasta according to package directions. Drain., Meanwhile, in a 6-qt. stockpot, cook and crumble sausage with onion and pepper flakes over medium heat until no longer pink, 5-7 minutes. Add garlic; cook 1 minute. Drain., Stir in tomatoes, cream, salt and basil; bring to a boil over medium heat. Reduce heat; simmer, uncovered, until thickened, 6-8 minutes, stirring occasionally. Stir in pasta; heat through. Serve with cheese.