Cook macaroni according to package directions; drain. Meanwhile, in a 6-qt. stockpot, cook and crumble beef with onion over medium heat until meat is no longer pink, 6-8 minutes; drain.
Stir in tomatoes, tomato sauce, corn, chiles and dry seasonings; bring to a boil. Reduce heat; simmer, uncovered, until flavors are blended, about 5 minutes. Stir in macaroni and cilantro.
1-⅓ cups: 224 calories, 6g fat (2g saturated fat), 37mg cholesterol, 567mg sodium, 24g carbohydrate (7g sugars, 4g fiber), 19g protein. Diabetic Exchanges: 2 lean meat, 2 vegetable, 1 starch.
