1. Cut beef into chunks or strips.
2. Add all ingredients except cornstarch to skillet.
3. Simmer, covered, for about 30 minutes. You may need to add a little water so mixture simmers well. (Don’t add too much water or mixture will get soupy.)
4. Add cornstarch to small amount of water to make a smooth paste. Add to meat mixture and stir.
5. Cook until cornstarch thickens (about 5 more minutes).

Note: This dish can be served as an entrée or as a burrito filling. When you buy flour tortillas for burritos, choose those that are thinner or smaller, because they have fewer calories and carbohydrate.