1. Heat oven to 450 degrees F. Coat 12 x 8 x 2-inch baking dish with nonstick cooking spray.
2. Saute beef in skillet over medium heat, breaking up clumps with wooden spoon, 3 to 4 minutes or until no longer pink.
3. Reserve 1 cup cheese for topping. Mix together remaining cheese, corn-muffin mix, eggs, salsa, chili powder, corn, beef and 2 cups water until smooth. Scrape into prepared dish.
4. Bake in 450 degrees F oven 20 minutes. Sprinkle on cheese. Bake 5 minutes, until knife inserted in center tests clean. Let stand 10 minutes.