Hmmm, let's see....
Sautee some onions, add ground beef and cook it, then add some tomatoe paste, add some stewed or diced tomatoes, add some tomatoe sauce, then add some cooked macaroni (any kind - I'm using elbow macaroni tonight). Heat it through and then serve it smothered with cheese! It is pretty good.
It's really economical.
Haven't you ever seen that Chef Boyardee commercial? (Or was it before your time?

) Anyway, it goes...
We're having Beef-a-roni,
Beed and Macaroni
Beef-a-roni's really neat
Beef-a-roni's fun to eat
Hooray
For Chef Boyardee!