Cook pasta according to package directions.

Meanwhile, in a skillet, cook beef over medium heat until no longer pink; drain.

Add water and taco seasoning; simmer, uncovered, for 15 minutes.

Rinse pasta in cold water and drain; place in a large bowl

Add beef mixture, cheese, green pepper, onion, tomato and olives; mix well. Add the dressing and toss to coat.

Cover and refrigerate for at least 1 hour.