PREPARE pasta according to package directions, adding asparagus during last minute of cooking. Drain.
MELT butter in a large skillet over medium heat. Add salmon; cook for about 5 minutes or until browned on one side. Turn over; cook until cooked through and fish flakes easily when tested with a fork. Remove from heat; break salmon into chunks with a fork. Add pasta, asparagus and dill; stir to combine. Serve topped with cheese.