Preheat oven to 400 degrees. Grease an 8 x 8 baking dish.
Mix corn muffin mix, milk, and 1 egg well. Spread batter evenly into prepared pan. Bake 20 minutes or until toothpick inserted comes out clean. Let it cool completely, then, crumble it into pieces.
Reduce heat to 350 degrees.
In a mixing bowl, mix corn muffin crumbles, ground beef, 1 egg, 1/2 cup enchilada sauce, salt, pepper, minced onion, and garlic powder. Mix well and form into balls.
Grease and 9 x 13 baking dish and place rounded meatballs into dish. Bake for 30 minutes. Remove from oven and top with remaining enchilada sauce and cheese.
Bake another 5-10 minutes or until cheese is melted and meatballs are cooked thoroughly.