In a large nonstick skillet, cook beef with onion over medium-high heat until no longer pink, 5-7 minutes; crumble meat., Stir in seasonings, tomatoes, tomato sauce, corn and water; bring to a boil. Stir in macaroni. Reduce heat; simmer, covered, until macaroni is tender, 15-20 minutes, stirring occasionally. Sprinkle with cheese.