Cook pasta according to package directions, omitting salt and fat.
While pasta cooks, rinse mussels in cold water; remove beards on mussels, and scrub shells with a brush. Discard opened or cracked mussels. Combine mussels, pasta sauce, and red pepper flakes in a large deep skillet. Cover and bring to a simmer over medium heat; cook 5 minutes or until mussels open. (Discard any unopened mussels.)
Place 3/4 cup drained pasta into each of 4 bowls. Top evenly with mussels and sauce; sprinkle with basil. Serve immediately.