In a large cast-iron or other heavy skillet, cook beef over medium heat until no longer pink,6-8 minutes, breaking into crumbles; drain.
Add tomatoes, broth, chili powder, salt and garlic powder; bring to a boil. Stir in rice and peppers. Reduce heat; simmer, covered, until liquid is absorbed, 8-10 minutes. Remove from heat; sprinkle with cheese. Let stand, covered, until cheese is melted. Freeze option: Before adding cheese, cool beef mixture. Freeze beef mixture and cheese separately in freezer containers. To use, partially thaw in refrigerator overnight. Heat through in a saucepan, stirring occasionally; add a little broth if necessary. Sprinkle with cheese.