Shred the cabbage.
Thinly slice the onion and green onion.
Cut the beef into bite-sized pieces.
Heat olive oil in a pan and stir-fry the beef.
When the beef is cooked, add the onion, green onion, and cabbage, and stir-fry together.
Season with salt and pepper.
Transfer the stir-fried ingredients to an oven-safe dish.
Sprinkle low-fat mozzarella cheese on top.
Bake in a preheated oven at 180°C (356°F) for 10-15 minutes.
When the cheese turns golden brown, remove and serve.