Cook the ground beef and onion until the onion is soft and translucent and the beef is cooked through.
Drain any fat from the ground beef in the pan.
Add the cream cheese and half and half.
Stir over low heat until the cream cheese melts into the cream and is smooth.
Add the Ro*Tel and smoked paprika and blend.
Now add the pasta and 1 cup of the cheese.
Top with the remaining 1 cup of cheese before serving.