Prepare pasta according to directions.

Brown beef and onions in a large skillet over med-hi heat 10 minutes , stirring until meat crumbles and is no longer pink and onions are tender.

Add parmesan, tomato puree and next 4 ingredients to beef mixture. Bring mixture to a boil over med-hi heat; reduce heat to med-lo and simmer, stirring occasionally, 20 minutes.

Add prepared tortellini to skillet, tossing to coat.

Serve with additional grated parmesan, if desired.