Preheat oven to 350°(F) degrees. Spray a 9x13 baking dish with non-stick cooking spray. In a large skillet over medium-high heat, cook beef and onions. Cook until meat is no longer pink, breaking into crumbles, and the onions are tender; drain.
Stir in rice, green chile peppers, tomatoes, corn, olives, seasonings. Stir in one cup of cheese.
Transfer to the prepared baking dish. Sprinkle with remaining 1 cup of cheese. Sprinkle with crushed corn chips. Bake, uncovered, 20–25 minutes, or until cheese is melted.