In 12-inch skillet, cook ground beef and onion over medium-high heat 5 to 7 minutes, stirring occasionally, until beef is thoroughly cooked; drain. Stir in kasha until kernels are moistened by beef mixture.
Stir in tomatoes, chiles, taco seasoning mix, corn and water. Heat to boiling. Cover; reduce heat to low. Simmer 5 to 7 minutes, stirring occasionally, until kasha is tender.
Sprinkle cheese over kasha mixture. Cover; cook 2 to 3 minutes or until cheese is melted. Sprinkle with cilantro and olives.