Preheat oven to 375 degrees.
Spray a 9x13 baking dish with cooking spray.
On stove-top, cook ground beef, onion, and garlic until brown. Drain off any excess fat.
Add taco seasoning, green chilies, corn and black beans to ground meat. Cook until heated through.
In a large bowl, combine meat mixture, ¾ of cheese blend, and all of the tator tots. Stir well to combine.
Pour ⅓ of the enchilada sauce in bottom of prepared baking pan and put meat mixture in, lightly patting in an even layer. Pour remaining enchilada sauce over mixture.
Place in oven and bake.