1. Chop cabbage and onions, set aside.
2. In a large skillet, cook the ground beef on medium heat until browned. Drain the fat. Set beef aside.
3. Spray skillet with non-stick cooking spray. Cook onions on medium heat until soft.
4. Add cabbage to the onions and cook until cabbage starts to brown.
5. Stir the beef into the cabbage and onion mixture.
6. Season with garlic powder, salt (optional), and pepper. Add red pepper flakes (optional) to the cabbage if you like it spicy.