Cook macaroni according to package directions. Meanwhile, in a large skillet, cook the beef, onion and green pepper over medium heat until meat is no longer pink and vegetables are tender. Add garlic; cook 1 minute longer. Drain.
Stir in the tomatoes, beans, corn, chili powder, salt and cumin. Bring to a boil. Reduce heat; cover and simmer for 15 minutes or until heated through.
Drain the macaroni and add to skillet; stir to coat. Sprinkle with cheese.