Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.

Meanwhile, brown the meat with the onion ina skillet; drain off liquids. Stir in salt, pepper, and chili powder to taste. Stir in kidney beans, and saute 5 to 10 minutes.

Serve meat and bean mixture over pasta.