Preheat oven to 350 degrees and line a large baking dish with parchment paper.
In a large skillet on medium heat, cook the onion and beef until the beef is browned. Stir in the red bell pepper and cook for an additional 1-2 minutes. Stir in the spinach and season with the garlic powder, salt, and pepper to taste.
In a separate bowl, beat together the eggs, Egg Beaters, and salt and pepper.
Add the beef mixture into the baking dish and pour the egg mixture on top.
Mix the Jiffy Corn Bread Mix, egg, and milk together to form the batter. Pour on top of the breakfast bake.
Bake for 35-40 minutes or until fully cooked.