Combine ground beef and onion in a large Dutch oven; cook until meat is browned, stirring to crumble meat. Drain off pan drippings. Stir in flour; cook 2 minutes, stirring constantly. Gradually add consommé, stirring constantly. Stir in chili powder, salt, cumin, and oregano. Simmer, uncovered, 30 minutes or until thickened, stirring occasionally.
Ladle chili into individual serving bowls, and sprinkle with cheese.