Preheat the oven to 375 degrees.
Brown ground beef chopping up as it cooks.
Lightly coat a baking dish W/ cooking spray.
In a large bow, combine rice, enchilada sauce, green chilies, corn, black beans, cilantro, cumin, chili powder, salt and pepper.
Stir in 1 cup cheddar cheese.
Add the beef and toss well.
Spread rice and beef mixture into the prepared baking dish.
Cover with tin-foil and bake for 40 minutes.
Remove foil and cover the top with the remaining cheese and let melt in the oven.
Serve immediately, garnished with avocado and tomato.