Bring a large pot of water to boil and cook pasta until al dente. Drain off excess water and add a few drops of olive oil to the pasta to prevent it from sticking.
Add ground beef and onions to a large skillet and cook until no pink is visible within the meat. Drain off any excess grease. Season with Cajun seasoning, onion powder, salt and pepper.
Add undrained chili beans, drained tomatoes, tomato sauce, cheese and pasta. Stir to combine ingredients. Serve & enjoy!