Don't have Make-Ahead Mexican Ground Beef on hand? Cook and drain 1 lb ground beef; stir in 1 package (1 oz) Old El Paso® taco seasoning mix, and cook about 5 minutes, stirring constantly. Cool.
To make in baking dish, spray 8-inch square (2-quart) glass baking dish with cooking spray. Spoon meat mixture into baking dish; spoon and spread cornmeal mixture over top. Freeze. When ready to serve, bake uncovered at 350°F 1 hour 30 minutes to 1 hour 40 minutes or until center is hot and edges are bubbly and hot. Sprinkle with cheese; bake 3 to 5 minutes longer or until cheese is melted. Cool 5 minutes before serving.
If you don't want to tie up your baking dish, crisscross 2 long strips of foil in baking dish, hanging ends over sides of baking dish, before making the casserole. Freeze casserole as directed. When firm, remove from baking dish, remove foil strips, and wrap securely in freezer plastic bag or foil; freeze. When ready to bake, place in original baking dish, and thaw in refrigerator.